Industrial Engineering and Production Management
A-B-C analysis

All of the these
Does not depend upon the unit cost of the item but on its annual consumption
Is meant for relative inventory control
Is a basic technique of materials management

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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

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
Arrival and waiting times are known and can be grouped to form a waiting line model

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