Industrial Engineering and Production Management
For a product layout the material handling equipment must

Be a general purpose type
Be designed as special purpose for a particular application
Employ conveyor belts, trucks, tractors etc.
Have full flexibility

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Industrial Engineering and Production Management
The important file in making a PERT is

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

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