Industrial Engineering and Production Management
The important file in making a PERT is

An event can't be accomplished until activities leading to it are completed
No activity from any event can be started from preceding event till it is completed
Length of arrow has nothing to do with time
All of the these

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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

Complete details of items in, waiting line are known
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
All variables and constants are known and form a linear equation

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Industrial Engineering and Production Management
The correct sequence of phases in value engineering is

Creative phase, information phase, investigation phase, evaluation phase
Information phase, creative phase, investigation phase, evaluation phase
Creative phase, investigation phase, evaluation phase, information phase
Investigation phase, information phase, creative phase, evaluation phase

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