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

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
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

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Industrial Engineering and Production Management
Under the Apprenticeship Act

All industries employing more than 100 workers have to recruit apprentices
Industries have to train apprentices according to their requirement
Only industries employing more than 500 workers have to recruit apprentices
All industries have to necessarily train the apprentices

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