Industrial Engineering and Production Management
Time study is carried out

By finding all the significant informations regarding the job, work place and machine tool etc
By observing and recording the time taken by the operator for an operation
All of these
By breaking up each operation into small elements which are measurable with the help of the measuring device accurately

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

No activity from any event can be started from preceding event till it is completed
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

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