Industrial Engineering and Production Management
Pessimistic time is

The average time required for a job
The minimum time in which an activity can possibly be accomplished
The most probable time considering all conditions
The maximum time which an activity might require

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Industrial Engineering and Production Management
The reasons which are basically responsible for the formation of a queue should be that

All of these
The average service rate Hess than the average arrival rate
Output rate is constant and the input varies in a random manner
Output rate is linearly proportional to input

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Industrial Engineering and Production Management
Routing

Prescribes the sequence of operations to be followed
Regulates the progress of job through various processes
Is concerned with starting of processes
Determines the programme for the operations

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