Question
Download Solution PDFThe optimistic, most likely and pessimistic time of an activity are 6, 9 and 12 days respectively. The standard deviation and variance of the activity are ________ respectively.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Optimistic time (to), Pessimistic time (tp), Most likely time (tm):
Expected time:
Standard deviation:
For a PERT network,
The variance is given by:
Calculation:
Given:
to = 6, tm = 9, tp = 12
Standard deviation:
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