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

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

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Industrial Engineering and Production Management
Work study is mainly aimed at

Developing the standard method and standard time of a job
Establishing the minimum time of completion of a job
Economizing the motions involved on the part of the worker while performing a job
Determining the most efficient method of performing a job

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