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A PERT problem: calculating variance of critical path

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Consider the tasks, durations, and predecessor relationships in the following network.

(see chart in attached file)

a. Draw the network:
b. Calculate Te for all tasks (fill in the table):
c. Calculate variance for all tasks (fill in the table):
d. Determine all paths, their estimated durations, and their variances:
e. Identify the critical path:
f. What is the likelihood (probability) of completing the project in 42 weeks?

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Solution Summary

This posting contains a typical PERT problem with drawing the Network diagram, calculating Te, determining Critical path, and Variance of critival path and calculating Probability of completing the project in given time.

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