Nominal group
A structured facilitation method to generate and prioritize ideas by having participants think individually, share in turn, clarify, and privately vote or rank. It ensures balanced participation and produces a clear, prioritized list for decision-making.
Key Points
- Uses silent individual idea generation followed by round-robin sharing to include every voice.
- Clarification happens without debate, then participants privately rank or vote.
- Produces a prioritized list based on aggregated scores, reducing dominance and groupthink.
- Best with small groups (5–9 participants), time-boxed segments, and a focused prompt.
- Works in-person or virtually with digital boards and anonymous polling.
Purpose of Analysis
Convert raw input from stakeholders into a ranked set of requirements or options that reflect collective preferences. The results guide scope boundaries, backlog ordering, and trade-off decisions when resources are limited.
- Resolve conflicting needs by revealing where support concentrates.
- Highlight must-have versus nice-to-have items based on actual votes.
- Create a transparent, auditable record of prioritization to support approvals.
Method Steps
- Frame the prompt: State the decision focus (e.g., “Which features deliver the most value for release 1?”) and criteria to consider.
- Silent idea generation: 3–10 minutes for participants to list ideas individually.
- Round-robin listing: Each person contributes one idea per turn to a shared board until all ideas are posted.
- Clarify and consolidate: Combine duplicates and ensure everyone understands each item without debating merit.
- Private voting or ranking: Assign points to top items (e.g., 5-3-1), dot-vote, or rank order; collect votes anonymously.
- Tally and prioritize: Sum scores, break ties with additional criteria if needed, and produce the ranked list.
- Confirm and record: Validate the outcome, capture rationales, owners, and next actions.
Inputs Needed
- Well-defined prompt or decision question aligned to scope objectives.
- Relevant stakeholder participants representing business, users, and technical roles.
- Decision criteria or constraints such as value, risk, cost, compliance, and time.
- Existing artifacts like user stories, requirement drafts, research, or metrics.
- Facilitation tools: virtual whiteboard, voting app, timer, and visible workspace.
Outputs Produced
- Ranked list of requirements, features, or options with vote totals.
- Documented clarifications, merged items, and assumptions.
- Decision log entries capturing the prioritization outcome and rationale.
- Action items for further analysis, estimation, or prototyping.
- Updates to the product backlog, requirement register, or scope baseline candidates.
Interpretation Tips
- Look at score distribution, not just the top item; wide spreads indicate strong preference, tight clusters suggest more analysis is needed.
- Treat results as a decision input; apply governance or role-based weighting when appropriate.
- Revisit items with low clarity scores or frequent misunderstandings before finalizing.
- Address ties using agreed criteria such as value vs. effort or risk reduction.
- Validate that critical compliance or architectural needs are not deprioritized solely by popularity.
Example
A team planning the first release of a mobile banking app needs to select features. The facilitator poses the prompt, “Which features deliver the greatest customer value in the first 3 months?” Participants ideate silently, then share items like mobile deposit, balance alerts, biometric login, and bill pay. After clarifying and merging duplicates, each person allocates 5, 3, and 1 points to their top three features. Tallying reveals mobile deposit and biometric login as clear leaders. The team records the prioritized list, notes that bill pay depends on a third-party API, and schedules follow-up estimation.
Pitfalls
- Poorly framed prompt causing scattered or incomparable ideas.
- Allowing debate during clarification, which pressures quieter participants.
- Insufficient stakeholder representation leading to skewed results.
- Non-anonymous voting that creates conformity bias.
- Over-reliance on vote totals without considering constraints and dependencies.
- Skipping documentation of assumptions and tie-break reasoning.
- Combining too many items, losing important nuances in requirements.
PMP Example Question
A project manager needs a fast, inclusive way to prioritize competing requirements while minimizing dominant voices. Which approach should they use?
- Unstructured brainstorming with open debate.
- Delphi technique with multiple expert surveys.
- Nominal group with round-robin idea sharing and private ranking.
- MoSCoW categorization by the product owner alone.
Correct Answer: C — Nominal group with round-robin idea sharing and private ranking.
Explanation: Nominal group ensures balanced participation and anonymous voting to prioritize requirements. Delphi is slower and expert-focused, while the other options risk dominance or lack broad input.
HKSM