Industrial Engineering and Production Management
The important file in making a PERT is

Length of arrow has nothing to do with time
All of the these
An event can't be accomplished until activities leading to it are completed
No activity from any event can be started from preceding event till it is completed

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Industrial Engineering and Production Management
Dispatching

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

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