Industrial Engineering and Production Management
Pick up the incorrect statement about advantages of work sampling

Permits a fine breakdown of activities and delays
Calculations are easier, method is economical and less time consuming
No time measuring devices are generally needed
Simultaneous study of many operators may be made by a single observer

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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 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
All of these

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