Industrial Engineering and Production Management
In CPM, the cost slope is determined by

Crash cost/Normal Cost
(Crash Cost - Normal cost)/ (Normal time - Crash time)
Normal Cost/Crash cost
(Normal cost - Crash cost)/ (Normal time - Crash time)

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Industrial Engineering and Production Management
Time study is carried out

All of these
By observing and recording the time taken by the operator for an operation
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

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