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A project manager is trying to coordinate all the activities on the project and has determined the following. Activity 1 can start immediately and has an estimated duration of 1 week. Activity 2 can start after activity 1 is completed and has an estimated duration of 4 weeks. Activity 3 can start after activity 2 is completed and has an estimated duration of 5 weeks. Activity 4 can start after activity 1 is completed and has an estimated duration of 8 weeks. Both activities 3 and 4 must be completed before the end of the project. If there is an approved change to activity 4 and it now takes 10 weeks, what is the duration of the critical path?
a) 10
b) 11
c) 14
d) 8The correct answer is B.
You need to draw a network diagram for this question. This diagram has two paths: Start, 1, 2, 3, End and Start, 1, 4, End. The original length of the first path is 10 and the second is 9, making the first path critical and the length of the critical path 10. If Activity 4 now takes 10 weeks instead of 8, the critical path would change to Start, 1, 4, End and be 11 weeks long.
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