Decision-making series · Part 3 of 6

A six-stage decision process, from identifying the issue to learning from the result

21 October 2026 · 6 min read · DecixionIQ

The models in this series are most useful when they are joined up into one process. Here is a six-stage architecture that takes a decision from the first description of the issue to the lessons learned after it has been carried out — and feeds those lessons into the next decision.

Stage 1Decision identificationDefine the issue, the objective, the type of decision and how material it is.
Stage 2Structured questioning and critical thinkingChallenge assumptions, identify uncertainties and test the evidence.
Stage 3Alternative development and evaluationCompare options on their financial effect, risk and fit with strategy.
Stage 4Governance, challenge and authorised decisionArrange independent challenge where it is needed, confirm decision rights, and pass a formal resolution.
Stage 5Execution and accountabilityAssign owners, allocate resources, set milestones and put controls in place.
Stage 6Outcome monitoring and organisational learningCompare what was expected with what happened, record lessons and corrective actions.
Review findings feed back into Stage 1 of future decisions.

What happens at each stage

Stage 1: Decision identification

Define the issue, the objective, the type of decision and how material it is.

Useful models: Issue trees, root cause analysis, Cynefin to recognise the kind of situation.
What the stage should produce: A framed decision: the exact question, what is not being decided, and its materiality.

Stage 2: Structured questioning and critical thinking

Challenge assumptions, identify uncertainties and test the evidence.

Useful models: Hypothesis testing, Bayesian reasoning, first-principles thinking, devil's advocacy, red teaming.
What the stage should produce: Evidence with sources, a list of assumptions and how much the case depends on each, and the open uncertainties.

Stage 3: Alternative development and evaluation

Compare options on their financial effect, risk and fit with strategy.

Useful models: Cost-benefit analysis, NPV and IRR, decision trees, MCDA, scenario planning, real options.
What the stage should produce: A recommendation with the alternatives considered and the reasons for preferring one.

Stage 4: Governance, challenge and authorised decision

Arrange independent challenge where it is needed, confirm decision rights, and pass a formal resolution.

Useful models: Decision Quality review, delegation of authority, RAPID, Three Lines Model.
What the stage should produce: A decision by the person or forum with authority, with conflicts, conditions and the reasons recorded.

Stage 5: Execution and accountability

Assign owners, allocate resources, set milestones and put controls in place.

Useful models: RACI, OKRs, Stage-Gate, project governance.
What the stage should produce: Owned actions with due dates and status.

Stage 6: Outcome monitoring and organisational learning

Compare what was expected with what happened, record lessons and corrective actions.

Useful models: PDCA, after-action reviews, outcome reviews, decision journals.
What the stage should produce: An outcome review against the case as approved, and lessons available to the next decision.

The loop is the point

Most organisations do stages 1 to 4 reasonably well for big decisions. Stages 5 and 6 are where the process usually breaks: actions drift without owners, and nobody compares the result with the case that was approved. Without that comparison, the organisation cannot tell a sound decision that met bad luck from a weak decision that got lucky — the subject of Part 6.

A proposed architecture, not a standard

This six-stage process is a proposed way of organising established models. It is not an independently validated standard, and its value in a particular organisation should be tested by putting it into practice and measuring the outcomes. Scale it to the decision, too: a routine operational choice does not need the same depth as a major acquisition. Part 5 covers how to scale it.

Where DecixionIQ fits

DecixionIQ records a decision through a chain of stages from Frame to Learning and shows which are recorded, partial or missing. The number of stages required depends on the governance level your organisation sets for the decision, and outcome reviews are compared with a frozen copy of the case as it stood at approval.

Sources and further reading

General information, not legal or professional advice.