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Which of the following is a dummy activity?


1. Excavate the foundations
2. Awaiting for the arrival concrete materials
3. Lay the foundation concrete
4. Cure the foundation concrete

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Correct Answer - Option 2 : Awaiting for the arrival concrete materials

Concept:

Dummy activity: It is an activity which has zero duration and is created for the sole purpose of establishing the relationship between two activities. It is represented by dashed lines.

Excavate the foundations: This will be an internal activity (a part of project which requires some duration and cost as well to reach the tail event.

Waiting for the arrival concrete materials: It won’t require any cost nor any time hence it can be called as a dummy activity.

Lay the foundation concrete: This is the second stage after the excavation which will require money and time hence not a dummy activity

Cure the foundation concrete: This is the third stage after the lay of concrete which requires minimum 7 days of curing and manpower & resource cost.  

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