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 basic difference between PERT and CPM is that

PERT deals with events and CPM with activities
Guessed times are used in PERT and evaluated times in CPM
Costs are considered on CPM only and not in PERT
Critical path is determined in PERT only

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Industrial Engineering and Production Management
In order that linear programming techniques provide valid results

Either (A) or (B)
Relations between factors must be linear (negative)
Relations between factors must be linear (positive)
Only one factor should change at a time, others remaining constant

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