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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.