Industrial Engineering and Production Management
Which of the following statement is correct about the network diagram?

The head of the arrow represents the end of an activity.
The tail end of the arrow represents the start of an activity.
All of the these
The events are represented graphically by circles or nodes at the beginning and the end of activity by arrows.

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Industrial Engineering and Production Management
Slack represents the difference between the

Latest allowable time and the normal expected time
Proposed allowable time and the earliest expected time
Latest allowable time and the earliest expected time
Normal allowable time and the latest expected time

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