Industrial Engineering and Production Management
PERT stands for

Program Evaluation and Review Technique
Planning Estimation and Resulting Technique
Program Estimation and Reporting Technique
Process Estimation and Review Technique

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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
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

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