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Project Management & Agile · Intermediate

Law of Diminishing Returns

Principle that after a point, adding more input yields progressively smaller output gains.

Definition

Adding more people to a task does not reduce duration proportionally and can increase communication overhead.

Example

Doubling testers from 4 to 8 reduces testing time by only 20%.

Exam tip

Related to Brooks's law: adding people to a late software project makes it later.

Related terms