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
- Define the objective and success criteria; explain how items will be prioritized.
- Have participants silently generate ideas individually for a set timebox.
- Collect ideas in a round-robin, recording them visibly without debate.
- Clarify each idea so everyone understands it; do not evaluate or criticize.
- Ask participants to privately rank or vote (for example, assign points or dot votes).
- Aggregate scores and display the ranked list; break ties using predefined rules.
- Discuss results briefly to confirm understanding; repeat voting if needed.
- 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?
- Focus group.
- Delphi technique.
- Nominal group technique.
- 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.
HKSM