Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has bee

Question

Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complete several recent jobs. Some of his workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table Immediate Time (days) Activity a b Predecessor(s) B, D A, E A, E 10 15 10 15 12 19 13 17 This exercise contains only part a. a) Based on the activity time estimates, the expected times and variance for each of the activities are Round your responses to two decimal places.) Activity Expected Time Variance

Explanation / Answer

a) The formula to calculate the expected time of an activity = (a+4m+b)/6

So using the above formula the expected time for each activity are

The formula to calculate the variance for an activity = Square of [(b-a)/6]

So using the above formula the variance for each activity are

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