Concept explainers
a
Interpretation: The paths through a project network diagram.
Concept Introduction: The critical path is the arrangement of project activities which gives an estimated time duration under which the project will be completed. The project activities may include float activities which can be delayed focusing on the shortest time duration.
b
Interpretation: Time required to complete project.
Concept Introduction: Early start time: The rule for the early start time of a task is that it is equal to the largest early finish time of the task’s immediate predecessors.
Early finish time: The early finish time of a task is the addition of both task time and early start time of the task.
c
Interpretation: Critical path through a project.
Concept Introduction: The critical path is the arrangement of project activities which gives an estimated time duration under which the project will be completed. The project activities may include float activities which can be delayed focusing on the shortest time duration.
d
Interpretation: Slack in activity C.
Concept Introduction: The critical path is the arrangement of project activities which gives an estimated time duration under which the project will be completed. The project activities may include float activities which can be delayed focusing on the shortest time duration.
e
Interpretation: The soonest activity H can be possibly started now.
Concept Introduction: The critical path is the arrangement of project activities which gives an estimated time duration under which the project will be completed. The project activities may include float activities which can be delayed focusing on the shortest time duration.
f
Interpretation: Latest activity without creating any delay in overall project completion time.
Concept Introduction: The critical path is the arrangement of project activities which gives an estimated time duration under which the project will be completed. The project activities may include float activities which can be delayed focusing on the shortest time duration.
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Practical Operations Management
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- The Porsche Shop, founded in 1985 by Dale Jensen, specializes in the restoration of vintage Porsche automobiles. One of Jensen's regular customers asked him to prepare an estimate for the restoration of a 1964 model 356SC Porsche. To estimate the time and cost to perform such a restoration, Jensen broke the restoration process into four separate activities: disassembly and initial preparation work (A), body restoration (B), engine restoration (C), and final assembly (D). Once activity A has been completed, activities B and C can be performed independently of each other; however, activity D can be started only if both activities B and C have been completed. Based on his inspection of the car, Jensen believes that the following time estimates (in days) are applicable: Activity Optimistic Most Probable Pessimistic A 3 4 8 B 3 4 5 C 5 7 9 D 4 5 12 Jensen estimates that the parts needed to restore the body will cost $4000…arrow_forwardA renovation of the gift shop at Orlando Amway Center has six activities (in hours). For the following estimates of a, m, and b, calculate the expected time and the standard deviationfor each activity:arrow_forwardA local political campaign must coordinate a number of necessary activities to be prepared for an upcoming election. The following table describes the relationships between these activities that need to be completed, as well as their completion times. Activity Immediate Predecessors Time (weeks) A - 3 B - 6 C A 2 D A 3 E B, C 7 F B 6 G D, E 1 H F 1 a) Develop a project network for this problem. b) Determine the EST, EFT, LST, LFT, and slack for each activity. c) What is the critical path and project completion time?arrow_forward
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