FF Relationships
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[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.
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
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.