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

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

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Industrial Engineering and Production Management
The purpose of micro-motion study is to

Assist in finding out the most efficient way of doing work
Help in collecting the motion time data for synthetic time standards
Train the individual operator regarding the motion economy principles
All of these

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