SOFTWARE ENGINEERING

Detailed explanation-1: -It is a type of activity in the network which neither consumes any time nor resource. It is an artificial activity. It is represented by a dashed arrow and identified by the terminal node or event to which it connects.

Detailed explanation-2: -Dummy activity is a hypothetical activity which requires zero time and zero resources for completion. Dummy arrow represents an activity with zero duration.

Detailed explanation-3: -While establishing the relationships and drawing the network diagram sometimes it so happens that there does not exist any real activity between two events but an event cannot be said to have occurred unless and until some other event has occurred. Such cases are shown on the network diagram as dummy activities.

Detailed explanation-4: -Waiting for the arrival concrete materials: It won’t require any cost nor any time hence it can be called as 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.