Industrial Engineering and Production Management
The assumption in PERT is

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

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Industrial Engineering and Production Management
Routing

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

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