Industrial Engineering and Production Management
One of the basic essentials of an incentive plan is that

A differential piece rate system should exist
Minimum wages should be guaranteed
All standards should be based on time studies
Provide incentive to group efficiency performance

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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
The laws governing arrivals, service times, and the order in which the arriving units are taken into source are known
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

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Industrial Engineering and Production Management
In order that linear programming techniques provide valid results

Either (A) or (B)
Only one factor should change at a time, others remaining constant
Relations between factors must be linear (negative)
Relations between factors must be linear (positive)

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