Industrial Engineering and Production Management
According to Rowan plan of wage incentive system, bonus is paid to a worker

On the percentage of standard time
Whose output exceeds 67% efficiency
On the percentage of time worked
On the percentage of time saved

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Industrial Engineering and Production Management
In queuing theory, the nature of the waiting situation can be studied and analysed mathematically if

All variables and constants are known and form a linear equation
Arrival and waiting times are known and can be grouped to form a waiting line model
Complete details of items in, waiting line are known
The laws governing arrivals, service times, and the order in which the arriving units are taken into source are known

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

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

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