Industrial Engineering and Production Management
The reasons which are basically responsible for the formation of a queue should be that

All of these
Output rate is constant and the input varies in a random manner
The average service rate Hess than the average arrival rate
Output rate is linearly proportional to input

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

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

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