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Operations Management: Processes and Supply Chains, 12th Edition by Larry P. Ritzman, Manoj K. Malhotra, Lee J. Krajewski

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Solved Problem 2

  1. An advertising project manager developed the network diagram shown in Figure 7.10 for a new advertising campaign. In addition, the manager gathered the time information for each activity, as shown in the accompanying table.

    A network diagram illustration shows activities A to G with their immediate predecessors, as represented in the Solved Problem 2 Table.

    Figure 7.10 Network Diagram for the Advertising Project

    TIME ESTIMATES (WKS)

    Activity

    Optimistic

    Most Likely

    Pessimistic

    Immediate Predecessor(s)

    A

    1

     4

     7

    B

    2

     6

     7

    C

    3

     3

     6

    B

    D

    6

    13

    14

    A

    E

    3

     6

    12

    A, C

    F

    6

     8

    16

    B

    G

    1

     5

     6

    E, F

    1. Calculate the expected time and variance for each activity.

    2. Calculate the activity slacks and determine the critical ...

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