Industrial Engineering and Production Management
Discrepancies of bar chart techniques are

Effective monitoring/controlling can't be done
All of these
Consequential effects of lack in one activity on the finish date
Free time available for an activity can't be predicted

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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
Determining the most efficient method of performing 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

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