Question

1. Sid Orland is involved in planning a scientific research project. The activities are displayed in the following diagram. Optimistic, most likely, and pessimistic time estimates are displayed in the following table. Figure for Problem 1. r e 14 16 E 4 H 4 7 11 7 11 16 20 G 5 0 33 611 16 11 16 D 3 Most Likely Pessimistic Activity Optimistic 4 4 (a) Determine the expected times and variances for each activity along the critical path (indicate the critical path). (b) What is the probability that the project will be finished in 18 days?

Answer 1

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ring "the lovele, + tine杺complete the pvojedis Cr .3 variance C osincul push) (b) Pro pability Thet proye & wi be nished in I day s dura hon ヒ expectedかne-t zx 5- 3 Z L= -0.333 3 ro m Z- table 37.03 ,/.