You are designing a PERT graph for a Polaris missile subsystem. Activity B and Activity C can be executed simultaneously, but both can only start after Activity A is fully completed. Furthermore, Activity D cannot begin until both Activity B and Activity C are finished.
If you draw this network exactly as described, what structural element is strictly mandatory to include between the events marking the completion of B and C, and why?

Question

You are designing a PERT graph for a Polaris missile subsystem. Activity B and Activity C can be executed simultaneously, but both can only start after Activity A is fully completed. Furthermore, Activity D cannot begin until  both  Activity B and Activity C are finished.
If you draw this network exactly as described, what structural element is strictly mandatory to include between the events marking the completion of B and C, and why?

Answer

A linear event, because the critical path must prioritize the longest activity between B and C

Answer

A slack line, to represent the float difference between B and C

Answer

A divergent event, because B and C must split into different paths before D starts.

Answer

A fake (dummy) activity, because two activities cannot have the exact same starting and ending events at the same time.

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You are designing a PERT graph for a Polaris missile subsystem. Activity B and A...

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