Industrial Engineering and Production Management
Which of the following statement is correct about the network diagram?

All of the these
The head of the arrow represents the end of an activity.
The events are represented graphically by circles or nodes at the beginning and the end of activity by arrows.
The tail end of the arrow represents the start of an activity.

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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
Developing the standard method and standard time of a job
Determining the most efficient method of performing a job

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