Engineering Economics
“When one of the factors of production is fixed in quantity or is difficult to increase, increasing the other factors of production will result in a less than proportionate increase in output”. This statement is known as the:

Law of demand
Law of supply
Law of diminishing return
Law of supply and demand

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Engineering Economics
The key to profitable operation for project cost control, is:

To keep the project cost equal to original cost estimate
To keep the project cost equal to subsequent construction budget
To keep the project cost within the cost budget and knowing when and where job costs are deviating
None of these

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