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    PERT/CPM network and critical path.

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    This is a re-post for a problem. I'm confused with the OTA's answer because in the response that I received (attached as 44279-business-CPM, PERT(1).xls), Activity F follows C and D, but in the problem definition, it is supposed to follow A and C. Please help me clarify this...

    I have also attached what I came up with for the model (attached as file MyModel.xls)

    Here is the original problem:

    Organizers for a political convention have determined ten activities that must be done before the convention begins.

    Activity Immediate Predecessors Time (Weeks)
    A --- 10
    B A 4
    C B 2
    D B 2
    E A 6
    F A, C 3
    G D 4
    H F, G 6
    I D 5
    J E 4

    Please clarify the following:
    a. Draw out the PERT/CPM network for the project.
    b. Identify the critical path.
    c. Determine how many weeks prior to the convention the work must begin.

    Thank you in advance.

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