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

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

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Industrial Engineering and Production Management
The assumption in PERT is

Cost of project will always be more than the estimated cost, if no timely corrections are taken
A project will always be behind schedule, if left uncorrected
A project can be subdivided into a set of predictable, independent activities
Activities are fixed and can't be changed

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