Unanimity

A decision rule in which every person in the group agrees on one chosen course of action.

Key Points

  • Requires 100% agreement; a single objection prevents a decision.
  • Often needs active facilitation, discussion, and compromise to reach alignment.
  • Tends to take longer than majority vote but creates strong buy-in and commitment.
  • Best for high-impact decisions where team support is critical; risk of stalemate exists.

Example

The change control board reviews a proposed scope change. After thorough discussion and adjustments, every member agrees to approve the change, so the decision is unanimous.

PMP Example Question

The project manager wants a decision rule that ensures every stakeholder supports the selected risk response. Which group decision-making technique should be used?

  1. Majority
  2. Plurality
  3. Autocratic
  4. Unanimity

Correct Answer: D — Unanimity (everyone agrees on one option)

Explanation: Unanimity requires full agreement from all decision makers, ensuring complete support for the chosen action.

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