Industrial Engineering and Production Management
Pessimistic time is

The maximum time which an activity might require
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

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Industrial Engineering and Production Management
In order that linear programming techniques provide valid results

Relations between factors must be linear (negative)
Only one factor should change at a time, others remaining constant
Relations between factors must be linear (positive)
Either (A) or (B)

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