Industrial Engineering and Production Management
Work study is mainly aimed at

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
Developing the standard method and standard time of a job

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

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

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