Industrial Engineering and Production Management
Time study is carried out

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

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Industrial Engineering and Production Management
The assumption in PERT is

Activities are fixed and can't be changed
A project can be subdivided into a set of predictable, independent activities
A project will always be behind schedule, if left uncorrected
Cost of project will always be more than the estimated cost, if no timely corrections are taken

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