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(V) Resource-Sharing Activities 1
RESOURCE-SHARING ACTIVITIES
IN REPETITIVE PROJECTS
Model and schedule resource-sharing activities
for the Sequence Step Algorithm
Presented by
Chachrist Srisuwanrat
2008
(V) Resource-Sharing Activities 2
4. RESOURCE-SHARING ACTIVITIES
 Activities sharing one or more
resources, called “resource-sharing
activities”
 “Shared Resources”
 How to schedule shared resources?
 What could be the problems?
(V) Resource-Sharing Activities 3
Examples of Repetitive Projects with
Resource-Sharing Activities
(V) Resource-Sharing Activities 4
Considerations When Scheduling
Resource-Sharing Activities
 Need to collect CIT and determine CLT
• In which sequence step?
 Need to delay resources’ arrival dates to eliminate
idle time
• Can the idle time in shared resources be eliminated?
 Need to allocate shared resource to activities
• Which resource-sharing activity gets the shared
resource first?
 Imposing CLT might change:
• CIT for the shared resource itself and of other resources
• Working sequences for the shared resource?
Supplementary Presentation V
(V) Resource-Sharing Activities 5
Scheduling Resource-Sharing Activities
 When using SQS-AL to schedule repetitive projects with
resource-sharing activities, schedulers must pay
attention to:
• Increasing idle time from SQS to SQS
• Changes in work sequence for shared resources
• Slow production rates of dependents between the
resource-sharing activities
• Precedence relationships between resource-sharing
activities (e.g., direct or indirect)
• Proximity of start dates for resource-sharing activities
• Effect of assigning CLT on their dependents
(V) Resource-Sharing Activities 6
(a) Determine CLTXY in SQS2
(b) Determine CLTXY in SQS3
In Which SQS? (SQS2 or SQS3)
Activities X and Y share the
same Resource ResXY.
(V) Resource-Sharing Activities 7
Can the idle time in shared be
eliminated?
(a) Determine CLTXY in SQS2 (b) Determine CLTXY in SQS4
(V) Resource-Sharing Activities 8
(a) Using two dedicated resources (b) Introducing a work break
(c) Speeding Activity B (d) Lowering Activities X and Y
Solutions for shared resources when their idle time cannot be eliminated
(V) Resource-Sharing Activities 9
Does the working sequences
change after assigning CLT?

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Model and schedule resource-sharing activities in repetitive projects using concept of the Sequence Step Algorithm

  • 1. (V) Resource-Sharing Activities 1 RESOURCE-SHARING ACTIVITIES IN REPETITIVE PROJECTS Model and schedule resource-sharing activities for the Sequence Step Algorithm Presented by Chachrist Srisuwanrat 2008
  • 2. (V) Resource-Sharing Activities 2 4. RESOURCE-SHARING ACTIVITIES  Activities sharing one or more resources, called “resource-sharing activities”  “Shared Resources”  How to schedule shared resources?  What could be the problems?
  • 3. (V) Resource-Sharing Activities 3 Examples of Repetitive Projects with Resource-Sharing Activities
  • 4. (V) Resource-Sharing Activities 4 Considerations When Scheduling Resource-Sharing Activities  Need to collect CIT and determine CLT • In which sequence step?  Need to delay resources’ arrival dates to eliminate idle time • Can the idle time in shared resources be eliminated?  Need to allocate shared resource to activities • Which resource-sharing activity gets the shared resource first?  Imposing CLT might change: • CIT for the shared resource itself and of other resources • Working sequences for the shared resource? Supplementary Presentation V
  • 5. (V) Resource-Sharing Activities 5 Scheduling Resource-Sharing Activities  When using SQS-AL to schedule repetitive projects with resource-sharing activities, schedulers must pay attention to: • Increasing idle time from SQS to SQS • Changes in work sequence for shared resources • Slow production rates of dependents between the resource-sharing activities • Precedence relationships between resource-sharing activities (e.g., direct or indirect) • Proximity of start dates for resource-sharing activities • Effect of assigning CLT on their dependents
  • 6. (V) Resource-Sharing Activities 6 (a) Determine CLTXY in SQS2 (b) Determine CLTXY in SQS3 In Which SQS? (SQS2 or SQS3) Activities X and Y share the same Resource ResXY.
  • 7. (V) Resource-Sharing Activities 7 Can the idle time in shared be eliminated? (a) Determine CLTXY in SQS2 (b) Determine CLTXY in SQS4
  • 8. (V) Resource-Sharing Activities 8 (a) Using two dedicated resources (b) Introducing a work break (c) Speeding Activity B (d) Lowering Activities X and Y Solutions for shared resources when their idle time cannot be eliminated
  • 9. (V) Resource-Sharing Activities 9 Does the working sequences change after assigning CLT?