Industrial Engineering and Production Management
Work study is mainly aimed at

Developing the standard method and standard time of a job
Establishing the minimum time of completion of a job
Determining the most efficient method of performing a job
Economizing the motions involved on the part of the worker while performing a job

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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
Output rate is linearly proportional to input
All of these
Output rate is constant and the input varies in a random manner

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