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Dummy activity example - Project Management Questions
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Dummy activity example

0
votes
I just can't understand why dummy activities exist. Why would anyone create an activity that doesn't exist is still a mystery to me.

If someone would be kind enough to provide me with an example of a dummy activity (in the real world) then I would be very grateful (and probably I will be able to understand the concept).
asked 5 years ago by anonymous

1 Answer

0
votes
Dummy activities are not real activities. They are just there to represent (complex) dependencies between activities in a CPM chart.

Let's say you have a burst activity A (see: http://www.projectmanagementquestions.com/2619/what-is-a-burst-activity ), from the terminating node (1) of that burst activity we have activity B and activity C starting (this means that both B and C are successor activities of A). Now, we then have an activity D that has both B and C as predecessors (D is a merge activity), so how do we represent this on an AOA diagram?

Well, we create a dummy activity going from node (2) which is the node of activity B to node (3) which is the node of activity C, and then we'll be able to create the D activity where the arrow starts from node (3).

An excellent example of a dummy activity can be found here: http://hspm.sph.sc.edu/courses/j716/cpm/cpm.html
answered 5 years ago by anonymous edited 5 years ago by MaplePM

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