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FF Relationships

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Hi Planners
when making a cpm schedule using p3,whats the advantages or disadvantages of using finish to finish relations between activities?and is it nescceray to use them?
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  1. 0
    Ronald Winter ·
    #1
    There are many reasons for using FF relationships. For example, such a relationship will properly show the effects of a delay to the predecessor on the successor activity.
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  2. 0
    Nestor Principe ·
    #2
    If the completion of two activities are physically dependent to each other then FF relationship is a must. Avoiding the use of FF and/or SS relationship would make a CPM programme easy to maintain when you status the programme.

    Regards,

    Nestor
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  3. 0
    Ronald Winter ·
    #3
    [Mis-posting by Nestor transferred to this forum by Moderator.]

    I think the usefulness of SS relationships needs no discussion.
    There´s two situations in which FF ralationships are a must:
    - When the succesor activity is shorter in duration than the predecesor.
    - After the predecesor in a SS relationship has started, progress override breaks the relationship and it is left without a succesor, therefore it would appear to have a large float until the end of the project duration. An FF relationshio to replace the previos solves the problem.
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