Core idea: A structured group process separates evidence, preference, recommendation and decision authority so disagreement becomes useful information.
When this model is useful
Use it for cross-functional decisions where no one person holds all relevant operational, financial, technical or stakeholder knowledge.
The method is most useful when the question, alternatives and time horizon are stated before calculations begin. It should clarify tradeoffs and identify which assumptions deserve attention, not merely produce a score.
Inputs and evidence
Clear decision rights, independent estimates, criteria, evidence, minority concerns, a facilitator and a method for resolving factual questions.
Use consistent units, definitions and periods across options. Mark estimates clearly, record their source and use ranges when precision is not supported. Evidence should be proportionate to the cost, risk and reversibility of the choice.
Step-by-step method
Collect views independently, discuss the largest differences, distinguish disagreements about facts from values, protect dissent and communicate the final rationale.
- Write the decision question and accountable owner.
- List realistic alternatives and eliminate any that fail hard constraints.
- Collect evidence and separate verified facts from assumptions.
- Run a base case and at least one downside test.
- Record the chosen option, accepted tradeoffs and review triggers.
Practical example
Different supplier scores may reveal that operations and finance use different definitions of reliability or cost, creating a productive question rather than a voting contest.
The point of the example is not the exact numbers. It is the discipline of using the same boundaries for every option and making the decision drivers visible.
Common mistake and limitation
Consensus can be false when junior participants defer to senior voices. State who decides and preserve material dissent in the record.
Review whether the result changes under reasonable alternative assumptions. A close or fragile ranking should be presented as such rather than converted into false certainty.
Questions to ask before deciding
- What evidence would change the preferred option?
- Which consequence is missing because it is difficult to measure?
- Could a threshold or constraint override the numerical result?
- Who receives the benefits and who bears the costs or risk?
- When should the decision be reviewed?
Professional context: Legal, tax, investment, safety, medical, engineering and regulated decisions require qualified, jurisdiction-specific advice.