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

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

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Industrial Engineering and Production Management
Routing

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

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