A graphical scheduling method focuses on planning resources to work continuously without interruption or idle time. The method is applicable to most construction projects consisting of repeating activities. Examples of repetitive projects are housing projects, high-rise buildings, and highways. VDO in Thai language https://www.youtube.com/playlist?list=PLxmusrL06qmISGPAmaED5TrV7QYahIPB6

1. Repetitive Scheduling Method
INTRODUCTION
1

2. 2
YouTube

3. What is RSM?
• It is a scheduling method that focuses on “Continuous Resource Utilization” in repetitive construction.
• It is a graphical method unlike LRA and URL which are calculation methods.
What is its Objective?
• Schedule resources -specific skilled workers/equipment- to work continuously without interruption (idle time)
There are 3 main constraints in RSM:
1. Activity Precedence Constraint, in most scheduling methods such as CPM and PERT
2. Resource Availability Constraint, such as in Limited Resource Allocation (LRA)
3. Resource Continuity Constraint, such as in Line-of-Balance (LOB)
Introduction to Repetitive Scheduling Method (RSM)
3

4. Repetitive Scheduling Method
Projects with Repeating Activities
(Repetitive Projects)
4

5. Projects with Repeating Activities
• Housing projects (multiple houses):
• Structure & Exterior for the 1st house, the 2nd house, …
• HVAC for the 1st house, the 2nd house, …
• Interior & Finishing for the 1st house, the 2nd house, …
• High-rise Buildings (multiple floors):
• Structure for the 1st floor, the 2nd floor, …
• HVAC for the 1st floor, the 2nd floor, …
• Interior for the 1st floor, the 2nd floor, …
• Roads & Highways (multiple stations):
• Excavation for the 1st station, for the 2nd station, …
• Backfill for the 1st station, for the 2nd station, …
• Layers for the 1st station, for the 2nd station, …
5
S2
H2
I2
Only with
Precedence Constraints.
No need to finish
House 1 before House 2.
S1
H1
I1
House1House2

6. A housing projects (2 houses)
• Structure & Exterior for the 1st house, the 2nd house
• HVAC for the 1st house, the 2nd house
• Interior & Finishing for the 1st house, the 2nd house
Given there is only one crew for each activity.
6
S1
H1
I1
S2
H2
I2
S1
H1
I1
S2
H2
I2
Only with
Precedence Constraints.
No need to finish
House 1 before House 2.
H1-H2
I1-I2
With
Precedence Constraints
Availability Constraints
S1
H1
I1
S2
H2
I2
With
Precedence Constraints
Availability Constraints
Continuity Constraints
House1House2House1House2House1House2

7. Repetitive Scheduling Method
Representations
Bar Chart, AON, and RSM Diagram
7

8. 8
S1
H1
I1
S2
H2
I2
Only with
Precedence Constraints.
No need to finish
House 1 before House 2.
House1House2
S1
3
H1
2
I1
1
Precedence Precedence
S2
3
H2
2
I2
1
Precedence Precedence

9. 9
S1
H1
I1
S2
H2
I2
Only with
Precedence Constraints.
No need to finish
House 1 before House 2.
House1House2
S1
H1
I1
S2
H2
I2
H1-H2
I1-I2
With
Precedence Constraints
Availability Constraints
House1House2
S1
3
H1
2
I1
1
Precedence Precedence
S2
3
H2
2
I2
1
Precedence Precedence
S1
3
H1
2
I1
1
Precedence Precedence
S2
3
H2
2
I2
1
Precedence Precedence

10. 10
S1
H1
I1
S2
H2
I2
S1
H1
I1
S2
H2
I2
Only with
Precedence Constraints.
No need to finish
House 1 before House 2.
H Idle Time
I Idle Time
With
Precedence Constraints
Availability Constraints
House1House2House1House2
S1
H1
I1
S2
H2
I2
With
Precedence Constraints
Availability Constraints
Continuity Constraints
House1House2
S1
3
H1
2
I1
1
Precedence Precedence
S2
3
H2
2
I2
1
Precedence Precedence
How to represent “Continuity Constraints” ?
S1
3
H1
2
I1
1
Precedence Precedence
S2
3
H2
2
I2
1
Precedence Precedence

11. How to represent several houses (units) effectively?
11
S1
3
H1
2
I1
1
Precedence Precedence
Unit 1
S2
3
H2
2
I2
1
Precedence Precedence
Unit 2
S3
3
H3
2
I3
1
Precedence Precedence
Unit 3
…
3
…
2
…
1
Precedence Precedence
…
3
…
2
…
1
Precedence Precedence
Unit …
Unit …
S9
3
H9
2
I9
1
Precedence Precedence
Unit 9

12. How to represent several houses (units) effectively?
12
A1
3
B1
2
D1
1Unit 1
C1
4
E1
2
A2
3
B2
2
D2
1Unit 2
C2
4
E2
2
A3
3
B3
2
D3
1Unit 3
C3
4
E3
2
By using AON or Bar Chart,
there is NOT enough space to present
all the units.
Quite Messy
Unit 4 to 5

13. How to represent several houses (units) effectively?
13
S1
3
H1
2
I1
1
Precedence Precedence
Unit 1
S2
3
H2
2
I2
1
Precedence Precedence
Unit 2
S3
3
H3
2
I3
1
Precedence Precedence
Unit 3
…
3
…
2
…
1
Precedence Precedence
Unit …
…
3
…
2
…
1
Precedence Precedence
Unit …
S9
3
H9
2
I9
1
Precedence Precedence
Unit 9

14. A repetitive project with only precedence constraints
14
S1 H1I1
Activityon Node
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
Production Diagram
S9 I9H9

15. Precedence & Availability & Continuity for Activity S
15
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
Activityon Node
S9 I9H9
S1
H1I1
Production Diagram
H idle time and I idle time between units

16. Production Diagram
H idle time and I idle time between units
Precedence & Availability & Continuity for S and H
16
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
Activityon Node
S9 I9H9
S1 H1 I1

17. Precedence & Availability & Continuity for S, H, and I
17
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
S9 I9
S1
H9
Activityon Node Production Diagram
or RSM Diagram
H1 I1

18. Production Diagram
H idletime and I idle time between units
Precedence & Availability & …
18
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
S H I
Production Diagram
or RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
S H I
without Continuity Constraints with Continuity Constraints
VS

19. Repetitive Scheduling Method
The General Idea of RSM
19

20. The general idea of RSM
• RSM satisfies 3 types of constraints: activity precedence, resource availability and continuity.
20
Precedenceonly Precedence& Availability Precedence& Availability & Continuity

21. The general idea of RSM
• RSM satisfies 3 types of constraints: activity precedence, resource availability and continuity.
21
• RSM is a graphical method –no calculation ☺
Precedenceonly Precedence& Availability Precedence& Availability & Continuity

22. The general idea of RSM
• RSM satisfies 3 types of constraints: activity precedence, resource availability and continuity.
22
• RSM is a graphical method –no calculation ☺
• RSM uses production diagram:
• To represent projects with repeating activities.
• To determine activities’ start and finish dates.
Precedenceonly Precedence& Availability Precedence& Availability & Continuity

23. Repetitive Scheduling Method
Concept of Controlling Point (cp)
23

24. RSM Diagram
Controlling Point (cp) determining repetitive activities’ schedule
24
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
cpAB
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5

25. RSM Diagram
Controlling Point (cp) determining repetitive activities’ schedule
25
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
cpAB
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5
B1

26. RSM Diagram
Controlling Point (cp) determining repetitive activities’ schedule
26
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
cpAB
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5

27. RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Controlling Point (cp) determining repetitive activities’ schedule
27
RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
cpAB
Slower predecessor, cp at Last unit.
A: 3 days/unit, and C: 2 days/unit.
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
cpAC

28. RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Controlling Point (cp) determining repetitive activities’ schedule
28
RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
cpAB
Slower predecessor, cp at Last unit.
A: 3 days/unit, and C: 2 days/unit.
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5 C5
cpAC

29. RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Controlling Point (cp) determining repetitive activities’ schedule
29
RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
cpAB
Slower predecessor, cp at Last unit.
A: 3 days/unit, and C: 2 days/unit.
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
cpAC

30. RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Controlling Point (cp) determining repetitive activities’ schedule
30
RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
cpAB
Slower predecessor, cp at Last unit.
A: 3 days/unit, and C: 2 days/unit.
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
cpAC
C1
C2
C3
C4
C5
If not using cp, there will be idle time between units.

31. Repetitive Scheduling Method
“Draw & Drag” to possible Controlling Points
31

32. RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Let’s “Draw & Drag” to possible cp instead
32
RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Slower predecessor, cp at Last unit.
A: 3 days/unit, and C: 2 days/unit.
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5
A1
A2
A3
A4
A5
cp
cpcp
cp
1. Determine possible controlling points

33. RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Let’s “Draw & Drag” to possible cp instead
33
RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Slower predecessor, cp at Last unit.
A: 3 days/unit, and C: 2 days/unit.
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
cp
cp
cp
cp
1. Determine possible controlling points
2. Draw the successor

34. RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Let’s “Draw & Drag” to possible cp instead
34
RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Slower predecessor, cp at Last unit.
A: 3 days/unit, and C: 2 days/unit.
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
cp
cp
cp
cp
1. Determine possible controlling points
2. Draw the successor
3. Drag it horizontally to the first possible cp
Drag Drag

35. RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Let’s “Draw & Drag” to possible cp instead
35
RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Slower predecessor, cp at Last unit.
A: 3 days/unit, and C: 2 days/unit.
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5
A1
A2
A3
A4
A5
cp
cp
cp
cp
1. Determine possible controlling points
2. Draw the successor
3. Drag it horizontally to the first possible cp
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
cpAC
cpAB

36. RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Let’s “Draw & Drag” to possible cp instead
36
RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Slower predecessor, cp at Last unit.
A: 3 days/unit, and C: 2 days/unit.
Faster predecessor, cp at First unit.
A: 3 days/unit, and B: 4 days/unit
A1
A2
A3
A4
A5
A1
A2
A3
A4
A5
1. Determine possible controlling points
2. Draw the successor
3. Drag it horizontally to the first possible cp
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
cpAC
cpAB

37. Repetitive Scheduling Method
Concept of Controlling Sequence
37

38. Concept of Controlling Sequence
What is Controlling Sequence?
• It is a sequence of unit activities from project Finish to Start.
• It determines project duration under continuity constraints.
• If a productivity of any activities on controlling sequence has changed, project duration will change.
How to identify Controlling Sequence? Easy. Start from the Project Finish to project Start via Controlling Points, cp.
38

39. Concept of Controlling Sequence
What is Controlling Sequence?
• It is a sequence of unit activities from project Finish to Start.
• It determines project duration under continuity constraints.
• If a productivity of any activities on controlling sequence has changed, project duration will change.
How to identify Controlling Sequence? Easy. Start from the Project Finish to project Start via Controlling Points, cp.
39

40. Concept of Controlling Sequence
What is Controlling Sequence?
• It is a sequence of unit activities from project Finish to Start.
• It determines project duration under continuity constraints.
• If a productivity of any activities on controlling sequence has changed, project duration will change.
How to identify Controlling Sequence? Easy. Start from the Project Finish to project Start via Controlling Points, cp.
40

41. Concept of Controlling Sequence
What is Controlling Sequence?
• It is a sequence of unit activities from project Finish to Start.
• It determines project duration under continuity constraints.
• If a productivity of any activities on controlling sequence has changed, project duration will change.
How to identify Controlling Sequence? Easy. Start from the Project Finish to project Start via Controlling Points, cp.
41

42. Concept of Controlling Sequence
What is Controlling Sequence?
• It is a sequence of unit activities from project Finish to Start.
• It determines project duration under continuity constraints.
• If a productivity of any activities on controlling sequence has changed, project duration will change.
How to identify Controlling Sequence? Easy. Start from the Project Finish to project Start via Controlling Points, cp.
42
Controlling Sequence:
B5-1, A1

43. Concept of Controlling Sequence
What is Controlling Sequence?
• It is a sequence of unit activities from project Finish to Start.
• It determines project duration under continuity constraints.
• If a productivity of any activities on controlling sequence has changed, project duration will change.
How to identify Controlling Sequence? Easy. Start from the Project Finish to project Start via Controlling Points, cp.
43
Controlling Sequence:
B5-1, A1

44. Concept of Controlling Sequence
What is Controlling Sequence?
• It is a sequence of unit activities from project Finish to Start.
• It determines project duration under continuity constraints.
• If a productivity of any activities on controlling sequence has changed, project duration will change.
How to identify Controlling Sequence? Easy. Start from the Project Finish to project Start via Controlling Points, cp.
44
Controlling Sequence:
B5-1, A1

45. Concept of Controlling Sequence
What is Controlling Sequence?
• It is a sequence of unit activities from project Finish to Start.
• It determines project duration under continuity constraints.
• If a productivity of any activities on controlling sequence has changed, project duration will change.
How to identify Controlling Sequence? Easy. Start from the Project Finish to project Start via Controlling Points, cp.
45
Controlling Sequence:
B5-1, A1

46. Concept of Controlling Sequence
What is Controlling Sequence?
• It is a sequence of unit activities from project Finish to Start.
• It determines project duration under continuity constraints.
• If a productivity of any activities on controlling sequence has changed, project duration will change.
How to identify Controlling Sequence? Easy. Start from the Project Finish to project Start via Controlling Points, cp.
46
Controlling Sequence:
B5-1, A1
Controlling Sequence:
C5, A5-1

47. Another example for the concept of Controlling Sequence
47 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
A
3
B
4
C
2
D
4

48. Another example for the concept of Controlling Sequence
48 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
A
3
B
4
C
2
D
4
D1
D2
D3
D4
D5

49. Another example for the concept of Controlling Sequence
49 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
A
3
B
4
C
2
D
4
cp
cp
D1
D2
D3
D4
D5

50. Another example for the concept of Controlling Sequence
50 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
A
3
B
4
C
2
D
4
cp
cp
cp
cp
D1
D2
D3
D4
D5

51. Another example for the concept of Controlling Sequence
51 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
D1
D2
D3
D4
D5
A
3
B
4
C
2
D
4
cp
cp
cp
cp
Drag

52. Another example for the concept of Controlling Sequence
52 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
D1
D2
D3
D4
D5
A
3
B
4
C
2
D
4
CD

53. Another example for the concept of Controlling Sequence
53 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
D1
D2
D3
D4
D5
A
3
B
4
C
2
D
4
CD

54. Another example for the concept of Controlling Sequence
54 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
D1
D2
D3
D4
D5
A
3
B
4
C
2
D
4
CD

55. Another example for the concept of Controlling Sequence
55 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
D1
D2
D3
D4
D5
A
3
B
4
C
2
D
4
CD

56. Another example for the concept of Controlling Sequence
56 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
D1
D2
D3
D4
D5
A
3
B
4
C
2
D
4
CD

57. Another example for the concept of Controlling Sequence
57 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
D1
D2
D3
D4
D5
A
3
B
4
C
2
D
4
CD

58. Another example for the concept of Controlling Sequence
58 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
D1
D2
D3
D4
D5
A
3
B
4
C
2
D
4
CD
Activities on ControllingSequence:
D5-1, C2-4, A5-1

59. Another example for the concept of Controlling Sequence
59 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
D1
D2
D3
D4
D5
A
3
B
4
C
2
D
4
CD
Activities on ControllingSequence:
D5-1, C2-4, A5-1
Changing productivity ofcontrollingactivities
will change project duration immediately.

60. Another example for the concept of Controlling Sequence
60 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
AC
AB
D1
D2
D3
D4
D5
A
3
B
4
C
2
D
4
CD
Activities on ControllingSequence:
D5-1, C2-4, A5-1
Changing productivity ofcontrollingactivities
will change project duration immediately.
On the other hand, changingthose
of non-controlling activities
will Not immediately affect project duration,
such as B1-5, C1, and C5.

61. Repetitive Scheduling Method
Critical Activities on RSM
61

62. Critical Activities on RSM
62 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.

63. Critical Activities on RSM
63 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
Project is delayed.

64. Critical Activities on RSM
64 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
Again, CPM doesn’t care about
resource continuity constraints.
If delaying an activity and it delays
project duration, it is a critical activity.
Therefore, D5 is a critical activity.
Project is delayed.

65. Critical Activities on RSM
65 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
Project is delayed.

66. Critical Activities on RSM
66 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
Project is delayed.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.

67. Critical Activities on RSM
67 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.Project is not delayed.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.

68. Critical Activities on RSM
68 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.Project is not delayed.
The discontinuity here doesn’t matter,
when talking about “Critical Activities”
C5
Tip 1. If the last unit is critical,
all are also critical, due to continuity.

69. Critical Activities on RSM
69 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.Project is not delayed.
The discontinuity here doesn’t matter,
when talking about “Critical Activities.”
Don’t try to satisfy continuity constraints
when identifying “critical activities.”
Tip 1. If the last unit is critical,
all are also critical, due to continuity.

70. Critical Activities on RSM
70 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
Project is not delayed.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.

71. Critical Activities on RSM
71 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
CDAB
C5
C4
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
AC
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
• Delaying C2 will not delay project.
Project is not delayed.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.

72. Critical Activities on RSM
72 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
B5
B4
B3
B2
B1
AB
D5
D4
D3
D2
D1
C5
C4
CD
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
AC
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
• Delaying C2 will not delay project.
• Delaying C1 will delay project.
Project is delayed.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.

73. Critical Activities on RSM
73 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
B5
B4
B3
B2
B1
AB
D5
D4
D3
D2
D1
C5
C4
CD
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
AC
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
• Delaying C2 will not delay project.
• Delaying C1 will delay project.
Project is delayed.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)

74. Critical Activities on RSM
74 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
• Delaying C2 will not delay project.
• Delaying C1 will delay project.
• Delaying B5 will not delay project.
Project is not delayed.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)

75. Critical Activities on RSM
75 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
• Delaying C2 will not delay project.
• Delaying C1 will delay project.
• Delaying B5 will not delay project.
Project is not delayed.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)
The discontinuity here doesn’t matter,
when talking about “Critical Activities.”

76. Critical Activities on RSM
76 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
• Delaying C2 will not delay project.
• Delaying C1 will delay project.
• Delaying B5 will not delay project.
• Delaying B1 will not delay project.
Project is not delayed.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)

77. Critical Activities on RSM
77 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
• Delaying C2 will not delay project.
• Delaying C1 will delay project.
• Delaying B5 will not delay project.
• Delaying B1 will not delay project.
Project is not delayed.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)

78. Critical Activities on RSM
78 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C4
CDAB
C3
C2
C1
C5
AC
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
• Delaying C2 will not delay project.
• Delaying C1 will delay project.
• Delaying B5 will not delay project.
• Delaying B1 will not delay project.
• Delaying A5 will not delay project.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)
Project is not delayed.

79. Critical Activities on RSM
79 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
C4
CD
C3
C2
C1
B5
B4
B3
B2
B1
C5
AC
AB
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
• Delaying C2 will not delay project.
• Delaying C1 will delay project.
• Delaying B5 will not delay project.
• Delaying B1 will not delay project.
• Delaying A5 will not delay project.
• Delaying A1 will not delay project.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)
Project is not delayed.

80. Critical Activities on RSM
80 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
• Delaying C2 will not delay project.
• Delaying C1 will delay project.
• Delaying B5 will not delay project.
• Delaying B1 will not delay project.
• Delaying A5 will not delay project.
• Delaying A1 will not delay project.
Therefore, critical activities are:
D5-1, and C1.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)

81. Critical Activities on RSM & Controlling Activities
81 RSM Diagram
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
A
3
B
4
C
2
D
4
D5
D4
D3
D2
D1
B5
B4
B3
B2
B1
C5
C4AC
CDAB
C3
C2
C1
A5
A4
A3
A2
A1
• Critical activities are that if delayed,
project will be delayed.
• Critical activities do not consider
resource continuity constraints.
• Delaying D5 will delay project.
• Delaying D4 will delay project.
• Delaying D1 will delay project.
• Delaying C5 will not delay project.
• Delaying C4 will not delay project.
• Delaying C2 will not delay project.
• Delaying C1 will delay project.
• Delaying B5 will not delay project.
• Delaying B1 will not delay project.
• Delaying A5 will not delay project.
• Delaying A1 will not delay project.
Therefore, critical activities are:
D5-1, and C1.
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)
D5-1, C2-4, and A5-1

82. Repetitive Scheduling Method
Example 1: 3 units
82
B
1
C
4
D
6
A
3

83. Example 1: 3 units
83
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
B
1
C
4
D
6
A
3
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …

84. Example 1: 3 units
84
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A
B
1
C
4
D
6
A
3
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …

85. Example 1: 3 units
85
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B
B
1
C
4
D
6
A
3
AB
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …

86. Example 1: 3 units
86
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B C
B
1
C
4
D
6
A
3
BC
AB
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …

87. Example 1: 3 units
87
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC
B
1
C
4
D
6
A
3
BC CD
AB
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …

88. Example 1: 3 units
88
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC
B
1
C
4
D
6
A
3
BC CD
AB
• Identify controllingpoints, cp
• AB, BC, CD
• Identify controllingsequence
• …
• Identify critical activities
• …

89. Example 1: 3 units
89
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC
B
1
C
4
D
6
A
3
BC CD
AB
• Identify controllingpoints, cp
• AB, BC, CD
• Identify controllingsequence
• …
• Identify critical activities
• …

90. Example 1: 3 units
90
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC
B
1
C
4
D
6
A
3
BC CD
AB
• Identify controllingpoints, cp
• AB, BC, CD
• Identify controllingsequence
• D3-1, C1, B2, A3-1
• Identify critical activities
• …

91. Example 1: 3 units
91
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC
B
1
C
4
D
6
A
3
BC CD
AB
• Identify controllingpoints, cp
• AB, BC, CD
• Identify controllingsequence
• D3-1, C1, B2, A3-1
• Identify critical activities
• …
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)

92. Example 1: 3 units
92
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC
B
1
C
4
D
6
A
3
BC CD
AB
• Identify controllingpoints, cp
• AB, BC, CD
• Identify controllingsequence
• D3-1, C1, B2, A3-1
• Identify critical activities
• …
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)

93. Example 1: 3 units
93
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC
B
1
C
4
D
6
A
3
BC CD
AB
• Identify controllingpoints, cp
• AB, BC, CD
• Identify controllingsequence
• D3-1, C1, B2, A3-1
• Identify critical activities
• D3-1, C1, B1
Tip 1. If the last unit is critical,
all are also critical, due to continuity.
Tip 2. If the last unit is not critical,
only the first unit could be critical.
So you only need to check the first & the last.
(Applicable to repetitive projects with
only typical repetitiveactivities.)

94. Repetitive Scheduling Method
Example 2: 4 units
94
A
3
B
1
C
6
D
3
E
5

95. Example 2: 4 units
95
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A
3
B
1
C
6
D
3
E
5
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …

96. Example 2: 4 units
96
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A
A
3
B
1
C
6
D
3
E
5
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …

97. Example 2: 4 units
97
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B
A
3
B
1
C
6
D
3
E
5
AB
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …

98. Example 2: 4 units
98
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B C
A
3
B
1
C
6
D
3
E
5
AB
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
AC

99. Example 2: 4 units
99
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B CD
A
3
B
1
C
6
D
3
E
5
AB
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
BDAC

100. Example 2: 4 units
100
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B CD
A
3
B
1
C
6
D
3
E
5
AB
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
BDAC
Determine possible cp from D and C to E

101. Example 2: 4 units
101
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B CD
A
3
B
1
C
6
D
3
E
5
AB
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
BDAC
E
Drag
Determine possible cp from D and C to E

102. Example 2: 4 units
102
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B CD E
A
3
B
1
C
6
D
3
E
5
AB
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
BD DEAC

103. Example 2: 4 units
103
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B CD E
A
3
B
1
C
6
D
3
E
5
AB
• Identify controllingpoints, cp
• AC, AB, BD, DE
• Identify controllingsequence
• …
• Identify critical activities
• …
BD DEAC

104. Example 2: 4 units
104
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B CD E
A
3
B
1
C
6
D
3
E
5
• Identify controllingpoints, cp
• AC, AB, BD, DE
• Identify controllingsequence
• …
• Identify critical activities
• …
BD DEAC
AB

105. Example 2: 4 units
105
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B CD E
A
3
B
1
C
6
D
3
E
5
• Identify controllingpoints, cp
• AC, AB, BD, DE
• Identify controllingsequence
• E4-1, D1, B2-3, A4-1
• Identify critical activities
• …
BD DEAC
AB

106. Example 2: 4 units
106
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B CD E
A
3
B
1
C
6
D
3
E
5
• Identify controllingpoints, cp
• AC, AB, BD, DE
• Identify controllingsequence
• E4-1, D1, B2-3, A4-1
• Identify critical activities
• …
BD DEAC
AB

107. Example 2: 4 units
107
Unit 1
Unit 2
Unit 3
Unit 4
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B CD E
A
3
B
1
C
6
D
3
E
5
• Identify controllingpoints, cp
• AC, AB, BD, DE
• Identify controllingsequence
• E4-1, D1, B2-3, A4-1
• Identify critical activities
• E4-1, D1, B1
BD DEAC
AB

108. Repetitive Scheduling Method
Example 3: 6 units
108
A
1
B
2
C
3
D
1
E
4
F
1

109. Example 3: 6 units
109
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1

110. Example 3: 6 units
110
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1

111. Example 3: 6 units
111
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B C
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1
AB, AC

112. Example 3: 6 units
112
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B C
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1
AB, AC
Determine possible cp from B and C to D

113. Example 3: 6 units
113
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B C
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1
AB, AC
Determine possible cp from B and C to D
D
Drag

114. Example 3: 6 units
114
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1
AB, AC
CD

115. Example 3: 6 units
115
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC E
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1
AB, AC DE
CD

116. Example 3: 6 units
116
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC E
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• ...
• Identify controllingsequence
• …
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1
AB, AC DE
CD
F
EF

117. Example 3: 6 units
117
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC E
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• AB, AC, CD, DE, EF
• Identify controllingsequence
• …
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1
AB, AC DE
CD
F
EF

118. Example 3: 6 units
118
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC E
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• AB, AC, CD, DE, EF
• Identify controllingsequence
• …
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1
F
AB, AC DE
EFCD

119. Example 3: 6 units
119
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC E
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• AB, AC, CD, DE, EF
• Identify controllingsequence
• F6, E6-1, D2-5, C6-1, A1
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1
F
AB, AC DE
EFCD

120. Example 3: 6 units
120
Unit 1
Unit 3
Unit 6
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC E
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• AB, AC, CD, DE, EF
• Identify controllingsequence
• F6, E6-1, D2-5, C6-1, A1
• Identify critical activities
• …
A
1
B
2
C
3
D
1
E
4
F
1
F
AB, AC DE
EFCD

121. Example 3: 6 units
121
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 400 42 44 46 48 50
A B DC E
Unit 1
Unit 3
Unit 6
Unit 2
Unit 4
Unit 5
• Identify controllingpoints, cp
• AB, AC, CD, DE, EF
• Identify controllingsequence
• F6, E6-1, D2-5, C6-1, A1
• Identify critical activities
• F6-F1, E6-1, D1
A
1
B
2
C
3
D
1
E
4
F
1
F
AB, AC DE
EFCD

122. Repetitive Scheduling Method
Example 4: 3 units
122
Act Predecessors Duration/Unit
A 2
B A 3
C A 2
D B, C 4
E D 1
F D 4
G E, F 4

123. Example 4: 3 units
123
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 300
Act Predecessors Duration/Unit
A 2
B A 3
C A 2
D B, C 4
E D 1
F D 4
G E, F 4

124. Example 4: 3 units
124
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 300
AC
A C B
AB, AC
Act Predecessors Duration/Unit
A 2
B A 3
C A 2
D B, C 4
E D 1
F D 4
G E, F 4

125. Example 4: 3 units
125
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 300
AC
A C B D
AB, AC
Drag
Act Predecessors Duration/Unit
A 2
B A 3
C A 2
D B, C 4
E D 1
F D 4
G E, F 4
Determine possible cp from B and C to D

126. Example 4: 3 units
126
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 300
AC
BD
A C B D
AB, AC
Act Predecessors Duration/Unit
A 2
B A 3
C A 2
D B, C 4
E D 1
F D 4
G E, F 4

127. Example 4: 3 units
127
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 300
AC
BD
A C B D E F
DE, DF
AB, AC
Act Predecessors Duration/Unit
A 2
B A 3
C A 2
D B, C 4
E D 1
F D 4
G E, F 4
DF

128. Example 4: 3 units
128
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 300
AC
BD
A C B D E F G
DE, DF
AB, AC
Drag
Act Predecessors Duration/Unit
A 2
B A 3
C A 2
D B, C 4
E D 1
F D 4
G E, F 4
DF
Determine possible cp from E and F to G

129. Example 4: 3 units
129
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 300
AC
BD
A C B D E F G
EG
DE, DF
AB, AC
Act Predecessors Duration/Unit
A 2
B A 3
C A 2
D B, C 4
E D 1
F D 4
G E, F 4
DF

130. Example 4: 3 units
130
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 300
AC
BD
A C B D E F G
EG
DE, DF
AB, AC
Act Predecessors Duration/Unit
A 2
B A 3
C A 2
D B, C 4
E D 1
F D 4
G E, F 4
DF
Controlling Sequence: G3-1, E2, D3-1, B1, A1

131. Example 4: 3 units
131
Unit 1
Unit 2
Unit 3
2 4 6 8 10 12 14 16 18 20 22 24 26 28 300
AC
BD
A C B D E F G
EG
DE, DF
AB, AC
Act Predecessors Duration/Unit
A 2
B A 3
C A 2
D B, C 4
E D 1
F D 4
G E, F 4
DF
Controlling Sequence: G3-1, E2, D3-1, B1, A1
Critical Activities: G3-1, E1

132. Repetitive Scheduling Method
Real Case Study: A Housing Project with 32 units
132

133. Uthenthawai: Master of Construction Management #UthenMCMUthenthawai: Master of Construction Management #UthenMCM
กรณีศึกษาการวางแผนเชิงปฏิบัติของโครงการหมู่บ้านจัดสรร
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สำหรับ
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โดย
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ไพโรจน์ ฤกษ์อุดมสิน: นักศึกษำ #UthenMCM รุ่น 1

134. Uthenthawai: Master of Construction Management #UthenMCM
Contents
1. Introduction
2. Problems
3. Objectives
4. Literature Reviews
5. Research
6. Results
7. Conclusion
134

135. Uthenthawai: Master of Construction Management #UthenMCM
1. Introduction
• Construction Projects consist of repetitive units/activities.
• Examples of Repetitive Units
• Housing: each house
• Condominium: each floor or room
• Highway: each section
• Repetitive activities are performed by sets of resources
• Schedule resources to work continuously
• Eliminate interruption and idle time
135

136. Uthenthawai: Master of Construction Management #UthenMCM
2. Problems
CPM Schedule with 745-week Idle Time RSM Schedule with 135-week Project Delay
136

137. Uthenthawai: Master of Construction Management #UthenMCM
3. Objectives
•Schedule resources to work continuously
•Maintain project duration
•Choose optimum number of resources
•Practical in terms of Engineering, Management, Finance, and Marketing
137

138. Uthenthawai: Master of Construction Management #UthenMCM
4. Literature Reviews: Methods
•Repetitive Scheduling Method (RSM)
•Linear Scheduling Method (LSM)
•Vertical Production Method (VPM)
•Line-of-balance Method (LOB)
138

139. Uthenthawai: Master of Construction Management #UthenMCM
4. Literature Reviews: Types of Repetitive Activities
Non-Repetitive Activities Non-Typical RepetitiveActivities
Repetitive Activities with Soft-Logic Constraints
139

140. Uthenthawai: Master of Construction Management #UthenMCM
4. Literature Reviews: Controlling Sequence from RSM
140

141. Uthenthawai: Master of Construction Management #UthenMCM
5. Research: Schedules & Methods
1. CPM
2. RSM.N (Normal)
3. RSM.S (Soft-logic), switching construction orders between units/houses/models
4. RSM.E (Expedite), adding or reducing the number of workers in order to shorten project duration
5. RSM.P (Parallel), using multiple groups of crew to start a repetitive activity at the same time
6. RSM.F (Final), considering other aspects of the project such as management, financing, and marketing
141

142. Uthenthawai: Master of Construction Management #UthenMCM
6. Results: CPM & RSM.N
1. CPM Schedule with 745-week Idle Time 2. RSM.N with 300-week Project Duration
142

143. Uthenthawai: Master of Construction Management #UthenMCM
6. Results: RSM.S
3. RSM.S with 300-week Project Duration
143

144. Uthenthawai: Master of Construction Management #UthenMCM
6. Results: RSM.E
3. RSM.S with 300-week Project Duration 4. RSM.Ewith 162-week Project Duration
144

145. Uthenthawai: Master of Construction Management #UthenMCM
6. Results: RSM.P & RSM.F
5. RSM.P with 139-week Project Duration 6. RSM.F with 147-week Project Duration
145

146. Uthenthawai: Master of Construction Management #UthenMCM
6. Results: Improvement & Comparison between CPM and RSM.F
146