Industrial Engineering and Production Management
In crash program for a project

both direct and indirect costs, increase
direct costs increase and indirect costs decrease
cost is no criterion
indirect costs increase and direct costs decrease

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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
All variables and constants are known and form a linear equation
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

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