Industrial Engineering and Production Management
A feasible solution to the linear programming problem should

Satisfy the non-negativity restrictions
Satisfy the problem constraints and non-negativity restrictions
Optimise the objective function
Satisfy the problem constraints

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Industrial Engineering and Production Management
Slack represents the difference between the

Proposed allowable time and the earliest expected time
Normal allowable time and the latest expected time
Latest allowable time and the normal expected time
Latest allowable time and the earliest expected time

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Industrial Engineering and Production Management
The basic difference between PERT and CPM is that

Guessed times are used in PERT and evaluated times in CPM
Costs are considered on CPM only and not in PERT
Critical path is determined in PERT only
PERT deals with events and CPM with activities

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