Industrial Engineering and Production Management
Time study is

Machine setting time
Method of fixing time for workers
Time taken by workers to do a job
The appraisal, in terms of time, of the value of work involving human effort

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Industrial Engineering and Production Management
The essential condition for the decompression of an activity is that

An activity could be decompressed to the maximum extent of its normal time
The project time should change due to decompression
An activity could be decompressed to the maximum extent of its normal time
After decompression the time of an activity invariably exceeds its normal time

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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

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

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