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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Industrial Engineering and Production Management
A big advantage of PERT over Gantt charts is that in the former case

Interrelationship among activities is clearly shown
Early start and late finish of an activity are clearly marked
Activities and events are clearly shown
Activity times are clear

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Industrial Engineering and Production Management
The assumption in PERT is

A project will always be behind schedule, if left uncorrected
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 can be subdivided into a set of predictable, independent activities

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