Industrial Engineering and Production Management
Work study is mainly aimed at

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

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

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