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Question 17.4: Compute slack times for the preceding example....

Compute slack times for the preceding example.

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Either the starting times or the finishing times can be used. Suppose we choose the starting times. Using ES times computed in Example 2 and LS times computed in Example 3, slack times are

Activities that have a slack of zero are on the critical path. Hence, the critical path is 1-2-5-6.

Activity LS ES (LS – ES)
Slack
1-2 0 0 0
1-3 6 0 6
2-4 10 8 2
2-5 8 8 0
3-5 10 4 6
4-5 16 14 2
5-6 19 19 0

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