Industrial Engineering and Production Management
Pessimistic time is

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

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Industrial Engineering and Production Management
Travel charts provide

An idea of the flow of materials at various stages
A compact estimate of the handling which must be done between various work sections
The information for changes required in rearranging material handling equipment
An approximate estimate of the handling which must be done at a particular station

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