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PMI-ACP · Question #384

PMI-ACP Question #384: Real Exam Question with Answer & Explanation

The correct answer is B: Pareto's Law. The 80/20 rule is known as Pareto's Law, named after Italian economist Vilfredo Pareto. He observed that roughly 80% of effects come from 20% of causes — for example, 80% of software defects stem from 20% of the code. Little's Law (A) relates to queuing theory, Mohr's Law (C) d

Submitted by yaw92· Apr 18, 2026Continuous Improvement

Question

The 80/20 rule is also known as what law?

Options

  • ALittle Law
  • BPareto's Law
  • CMohr's Law
  • DThe Law of Averages

Explanation

The 80/20 rule is known as Pareto's Law, named after Italian economist Vilfredo Pareto. He observed that roughly 80% of effects come from 20% of causes — for example, 80% of software defects stem from 20% of the code. Little's Law (A) relates to queuing theory, Mohr's Law (C) does not exist as a standard concept, and the Law of Averages (D) is a different statistical principle.

Topics

#80/20 Rule#Pareto Principle#Quality Management#Prioritization

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