Nominal group technique

A structured, facilitator-led method used to gather ideas from a group and then have participants privately rank or vote to create a prioritized list. It reduces bias and helps groups reach agreement efficiently.

Key Points

  • Structured group technique that combines idea generation with independent voting to prioritize items.
  • Produces a ranked list that quantifies group preference and supports transparent decisions.
  • Reduces bias by separating discussion from evaluation and using private or anonymous votes.
  • Works best with a neutral facilitator, clear objectives and criteria, and timeboxed rounds.
  • Useful for prioritizing requirements, features, risks, issues, or improvement actions.
  • Suitable for in-person or virtual sessions using simple tools like sticky notes or online boards.

When to Use

  • When you expect many ideas and need a quick, fair way to prioritize them.
  • When diverse stakeholders must contribute without dominance or groupthink.
  • When discussion tends to drift or become argumentative and needs structure.
  • When you need traceable prioritization to justify decisions to sponsors or governance.
  • Early in planning to focus scope, or during execution to choose among options.
  • When teams are remote and require a simple, repeatable decision process.

How to Use

  1. Define the objective and success criteria; explain how items will be prioritized.
  2. Have participants silently generate ideas individually for a set timebox.
  3. Collect ideas in a round-robin, recording them visibly without debate.
  4. Clarify each idea so everyone understands it; do not evaluate or criticize.
  5. Ask participants to privately rank or vote (for example, assign points or dot votes).
  6. Aggregate scores and display the ranked list; break ties using predefined rules.
  7. Discuss results briefly to confirm understanding; repeat voting if needed.
  8. Agree on the final prioritized list, decisions, and next steps.

Inputs Needed

  • Clear problem or decision statement and any prioritization criteria or weights.
  • List of relevant participants representing needed perspectives.
  • Neutral facilitator and a scribe or tooling to capture inputs.
  • Timebox, agenda, and ground rules for discussion and voting.
  • Tools for idea capture and private or anonymous voting (cards, dots, forms, or digital apps).
  • Decision rules for tie-breaking and escalation if consensus is not reached.

Outputs Produced

  • Prioritized and ranked list of ideas or options with scores.
  • Documented voting results, tie-break decisions, and decision rationale.
  • Action items, owners, and timelines based on the prioritized outcomes.
  • Parking lot items for further research or later consideration.
  • Updates to project artifacts such as backlog, requirements, or risk register.

Example

A cross-functional team must choose which improvement actions to implement this quarter. The facilitator asks each member to write ideas silently, then shares them round-robin and clarifies. Each person assigns 5 points across their top three ideas. Scores are summed, producing a ranked list; the team commits to the top three items and records follow-ups for the rest.

Pitfalls

  • Vague objectives or criteria leading to inconsistent voting.
  • Allowing debate or criticism during idea capture, which suppresses input.
  • Non-anonymous voting that pressures participants to conform.
  • Too few or too many participants to get balanced, manageable input.
  • Overlooking tie-break rules or ignoring agreed criteria during final selection.
  • Failing to document rationale and action items, reducing traceability.

Related Items

  • Brainstorming.
  • Delphi technique.
  • Multi-criteria decision analysis (MCDA).
  • Affinity diagramming.
  • Dot voting and other voting methods.
  • Focus groups and facilitated workshops.

PMP Example Question

A project manager needs a fair, fast way to gather stakeholder input and produce a prioritized list of features while minimizing bias and dominance. Which technique should the PM use?

  1. Focus group.
  2. Delphi technique.
  3. Nominal group technique.
  4. Affinity diagramming.

Correct Answer: C — Nominal group technique.

Explanation: It combines structured idea generation with private voting to create a prioritized list. Delphi is anonymous expert consensus over multiple rounds, not an in-session prioritization activity.

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