Industrial Engineering and Production Management
Activity slack or float of any event on a PERT/CPM chart is represented by

Latest finish time of event earliest finish time of the event
Latest start time of succeeding event earliest finish time of preceding event activity time
Anyone of the above
Latest start time of the event earliest start time of the event

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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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