Industrial Engineering and Production Management
Travel charts provide

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

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Industrial Engineering and Production Management
A big advantage of PERT over Gantt charts is that in the former case

Activity times are clear
Activities and events are clearly shown
Interrelationship among activities is clearly shown
Early start and late finish of an activity are clearly marked

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