Industrial Engineering and Production Management
Discrepancies of bar chart techniques are

Consequential effects of lack in one activity on the finish date
All of these
Free time available for an activity can't be predicted
Effective monitoring/controlling can't be done

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Industrial Engineering and Production Management
Routing

Is concerned with starting of processes
Regulates the progress of job through various processes
Prescribes the sequence of operations to be followed
Determines the programme for the operations

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