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

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

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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 important file in making a PERT is

An event can't be accomplished until activities leading to it are completed
All of the these
Length of arrow has nothing to do with time
No activity from any event can be started from preceding event till it is completed

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