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

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

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Industrial Engineering and Production Management
Which of the following are the guidelines for the construction of a network diagram?

All of the these
Dangling must be avoided in a network diagram
Each activity is represented by one and only one arrow in the network
Dummy activity consumes no time or resource

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