Parkinson’s Law states that work will expand to fill the amount of time allotted to it. 1 is incorrect; the Law of Diminishing Returns states that increased labor doesn’t always guarantee an increase in the yield, and can even diminish an organization’s overall profit. (See the PMP Study Guide, Chapter 6 for more details.) 3 is incorrect because Pareto’s Law is the 80/20 Law; for example, 80 percent of your business comes from 20 percent of your customers. 4 is incorrect because contingency reserve is time allotted for schedule slippage.