The document discusses activities, projects, and bar charts for project scheduling. An activity has a defined start and end time and uses resources. A project is a set of activities with defined objectives, completion date, and budget. A bar chart is a common project scheduling tool that displays activities as horizontal bars placed sequentially according to duration and dependencies. It can identify critical paths where delays could impact the overall project schedule.

1. What is Activity
• An activity or task is a given kind and
amount of work which:
– Consumes time
– Consumes Resources
– has a definable beginning and ending
Fixing False Sealing
3 men x 30 days
Start time 3000 board type End time
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King Saud University Dr. Khalid Al-Gahtani

2. What is Project
• A project is a set of activities with
– A well-defined objective(s)
– A target completion date
– An estimated budget
Plan s & R equired
Specification s Product
Project
M an agem ent
L im ited Project
G iven R esources O bjectives D esired
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King Saud University Dr. Khalid Al-Gahtani

3. Type of Schedule
• Written Schedule
• Gantt Chart (Bar Chart)
• CPM Schedules (Critical Path Method)
A
– Activity on Arrow 5
– Activity on Node AB A B
• PERT
30 X = 36 40
• LSM (Linear Schedule Method)
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King Saud University Dr. Khalid Al-Gahtani

4. Bar Chart
• STEPS
– Analyze the project and specify the basic approach
to be used.
– Break the project down into a reasonable number of
activities to be scheduled.
– Estimate the time required to perform each activity.
– Place the activities in sequence of time, taking into
account the requirements that certain activities
must be performed sequentially.
• Logical constrain
• Resources constrain
– If a completion date is specified, the diagram is
adjusted until this constraint is satisfied.
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King Saud University Dr. Khalid Al-Gahtani

5. Bar Chart
• Example:
Activity Activity Description Dependency Duration
ID
A Excavation 3
C Foundation A 3
D Column B, C 2
B Moving the soil out A 2
E Wall C, D 5
F Roof E, D 5
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King Saud University Dr. Khalid Al-Gahtani

6. Solution
A
C
D
B
E
F
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
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King Saud University Dr. Khalid Al-Gahtani

7. Alternative Solution
A
B
C
D
E
F
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
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King Saud University Dr. Khalid Al-Gahtani

8. Bar Chart
• Advantages of Bar Chart
– Very Graphical
– Easy to understand
– Most widely used
• Disadvantages of Bar Chart
– Difficult to Update
– Difficult to find the Critical Path
– Difficult to setup and maintain a large project because
it is essentially a manual graphical procedure.
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King Saud University Dr. Khalid Al-Gahtani

9. How to identify the Critical path
in a Bar Chart
• Types of a Project Activity
– Critical Activity: if it is delayed, it will delay the
project.
– Noncritical Activity: it may not delay the
project if it’s well managed.
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King Saud University Dr. Khalid Al-Gahtani

10. STEPS to identify the Critical Path
• Start with the last Activity; Draw a vertical line
from the i Node of late Activity.
i j
• The activities whose j nodes touch the vertical
line, are Potential Critical Activity.
• Draw a vertical line from the i node of the new
critical activity.
• Proceed in this manner until you reach Day 0.
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King Saud University Dr. Khalid Al-Gahtani

11. Identify the Critical Path
A
B
C
D
E
F
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
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King Saud University Dr. Khalid Al-Gahtani

12. Class Work
Activity Depends upon Duration (Weeks)
A C, J 3
B F 2
C F 3
D C, I 4
E G 5
F H 4
G H 2
H - 3
I E, F 4
J B 2
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King Saud University Dr. Khalid Al-Gahtani

13. CW Solution
Act. W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18
H
F
G
E
I
B
C
J
A
D
Spring 2008, Bar Chart 13
King Saud University Dr. Khalid Al-Gahtani