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I have a question

Maths - Network Analysis

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I have a question on network analysis. For this diagram, I want to show that activity C requires activity A, activity D requires A, activity E requires activity A and B, activity F requires activity E and B. I have introduced dummy activities but now it looks like activity C requires activity A and B, and activity D requires activity A and B. How do I fix this problem?

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Usual disclaimer of "this isn't something I'm familiar with": Have you got a link to what "network analysis" is in this context?

Almost certainly a stupid question, but are you sure your activities are supposed to be edges and not vertices? If you were using vertices this would basically be a DAG (and showing up the dependencies would be trivial).

Reply 4

Mhall357

Original post by DFranklin

This is to do with projects in operations research.

Activities are not supposed to be vertices.

Reply 5

ghostwalker

Original post by Mhall357

This is to do with projects in operations research.

Activities are not supposed to be vertices.

OR allows for both activity on arc (AoA) and activity on node (AoN). If you have the choice, as DFranklin said, the latter makes life easier and doesn't require the use of dummy activities.

If you're stuck with using AoA, it would help to label the nodes so they can be refered to - can't talk about it much otherwise.

Clearly you can't have the upwards vertically running dummy as you're already realised, so remove it.

I would create a new node just for the start of E. Edit: Or hang it directly off B.

(edited 3 years ago)