Industrial Engineering and Production Management
Break-even point is the point where

Fixed and variable cost lines intersect
Variable and total cost lines intersect
Sales revenue and total expensive lines intersect
Fixed and total cost lines intersect

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Industrial Engineering and Production Management
Work sampling is applied for

Estimating the percentage of the time consumed by various job activities
Estimation of the percentage utilization of machine tools
All of these
Finding out time standards, specially where the job is not repetitive and where time study by stop watch method is not possible

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Industrial Engineering and Production Management
The assumption in PERT is

A project can be subdivided into a set of predictable, independent activities
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

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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
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
All of the these

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