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

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

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Industrial Engineering and Production Management
Value engineering aims at finding out the

Resale value of a product
Break-even point when machine requires change
Major function of the item and accomplishing the same at least cost without change in quality
Depreciation value of a product

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