Thinkings
24 learning guides with explanations, examples, practice, and review notes. Choose a question, study the method, and try it on a problem of your own.
Strategic thinking
Set an aim, make trade-offs under uncertainty, and design choices you can test with limited resources.
Playing to Win choice cascadeTrade-off and activity-fit testMulti-horizon option comparisonKey question: what will we do—and not do? What would change my mind?Critical thinking
Separate claims from evidence, inspect assumptions and rival explanations, and arrive at revisable judgments.
Claim–evidence–assumption splitAnalysis of Competing HypothesesConditional confidence statementKey question: what would change my mind? What does the evidence show?Analytical thinking
Make the question, data, assumptions and uncertainty visible before trusting a number. The three moves below adapt the UK AQuA guidance; they are not an official named framework.
AQuA question and denominator framingDriver tree decompositionSensitivity and uncertainty boundsUse it to decompose a measurable decision. How do the parts interact?Systems thinking
A system's behavior can emerge from relationships, feedback and delays, not just one faulty component.
Behavior-over-time graphCausal loop diagrammingLeverage-point and side-effect checkUse it when a local fix creates new problems. What can go wrong, and with what impact?Risk thinking
Risk assessment connects threats, vulnerabilities, likelihood and impact; the score is only a decision aid.
Threat–vulnerability–impact chainControl and residual-risk reviewRisk treatment and trigger registerUse it for reliability, security and continuity decisions. What if the future unfolds differently?Scenario thinking
Scenarios are contrasting plausible futures for testing decisions—not predictions.
2×2 critical-uncertainty matrixWind-tunnel plan stress testEarly-warning signpost trackingUse it when major uncertainties could change the choice. What must fundamentally be true?First-principles thinking
Strip away the familiar implementation and derive options from validated outcomes and constraints. The steps below adapt systems-engineering guidance, not a universal named first-principles formula.
Constraint vs. convention auditFunctional decompositionClean-sheet trade studyUse it when inherited solutions constrain the design. Why does the problem recur?Root-cause thinking
A root-cause inquiry tests contributing factors and asks whether removing a candidate cause would prevent recurrence.
Blameless problem statementBranching Five WhysRecurrence-prevention testUse it when fixing symptoms is not enough. And then what happens?Second-order thinking
Look beyond the immediate benefit: trace indirect effects, feedback, opportunity costs and longer-term consequences.
“And then what?” consequence chainFutures wheel mappingSafeguard and reversal indicatorUse it to catch delayed costs and side effects. What else could work?Creative thinking
Separate idea generation from evaluation. Six Thinking Hats is one way to deliberately switch between facts, possibilities, value, risk, feelings and process.
Six Thinking Hats role switchingCross-mechanism option generationLow-cost concept probeUse it to generate alternatives before judging them. What do people actually need?Design thinking
Design Council's Double Diamond alternates divergence and convergence: Discover, Define, Develop, Deliver. Testing can take you back to the beginning.
Double Diamond divergence–convergenceContextual user and reviewer observationRapid journey prototypingUse it for services and user journeys. Which option should we choose?Decision thinking
A decision tree makes choices, uncertain branches and their consequences explicit. Probabilities and outcome values are assumptions to inspect, not automatic facts.
Decision and chance treeExpected value and tail-risk checkValue-of-information thresholdUse it when alternatives have uncertain outcomes. How certain are we?Probabilistic thinking
Bayesian updating combines prior information with current data to revise an uncertain assessment. The result depends on the chosen prior and evidence model.
Base-rate prior anchoringBayesian diagnostic updatingAction-threshold and correlation checkUse it when evidence changes your confidence. What are we giving up?Economic thinking
Opportunity cost is the value of the next-best alternative; marginal analysis compares what one additional increment costs and contributes.
Explicit opportunity-cost pairingMarginal increment comparisonSunk-cost exclusion ruleUse it to allocate scarce resources. Where is the value and leverage?Commercial thinking
Start with a specific beneficiary's jobs, pains and gains; compare offers on value and total commitment, not only the sticker price.
Value Proposition Canvas mappingTotal lifecycle and switching-cost auditViable exit and outcome termsUse it for offers, suppliers and contracts. Who is affected, and what do they need?Stakeholder thinking
Stakeholder mapping names the people who influence or experience a change and tailors engagement to their roles, power and interest.
Power–interest–impact mappingAudience-specific evidence ledgerTiered consult–inform–involve planUse it when a decision crosses teams or interests. How will this work reliably now?Operational thinking
Operational thinking turns a goal into observable action under current constraints. The OODA loop—Observe, Orient, Decide, Act—is one useful cycle, not a command to act without understanding.
OODA cycle (Observe–Orient–Decide–Act)Blast-radius guardrail and rollbackClosed-loop feedback checkUse it for live execution and feedback. What exactly happens next?Tactical thinking
Implementation intentions link a specific anticipated cue to a specific action: if X happens, then do Y.
If–then implementation intentionsObservable completion criteriaCue visibility and exception routingUse it to turn intent into executable steps. What matters most within this timebox?Prioritization thinking
MoSCoW separates Must, Should, Could and Won’t have this time. It makes exclusions visible, not permanent judgments about importance.
Timeboxed MoSCoW classificationSafety and viability Must-testPublished Won’t-list and buffer protectionUse it when demand exceeds capacity. What will this choice create years later?Long-term thinking
Long-term thinking links today's commitment to future capability, lock-in and flexibility. It uses future pathways to challenge assumptions, not to promise a forecast.
Lifecycle horizon alignmentCapability backcastingOption-preserving modular stepsUse it for architecture, skills and lifecycle decisions. What if we did not do this?Counterfactual thinking
Counterfactuals compare a chosen path with plausible alternatives. A premortem is one exercise: imagine the plan failed, then inspect why before committing.
Realistic do-nothing baselineProspective hindsight (Premortem)Staged vs. full-commitment comparisonUse it to compare action, inaction and failure paths. What if the consensus is wrong?Contrarian thinking
Devil's advocacy builds the strongest evidence-based case against a prevailing judgment; it is not disagreement for its own sake.
Consensus assumption inventoryEvidence-based devil’s advocacyDiagnostic distinguishing testUse it when a team settles too quickly. What did our actions teach us?Reflective thinking
Reflective practice examines the frame behind an action, especially when results surprise us, then changes future practice.
Expected-vs-observed delta logDouble-loop frame inspectionNext-case practice revisionUse it during and after surprising outcomes. How am I thinking about this?Metacognitive thinking
Metacognition monitors the thinking process itself: plan a method, check understanding, then evaluate and regulate it.
Plan–Monitor–Evaluate checkpointsConfidence-to-evidence calibrationMid-course disconfirmation promptUse it to catch overconfidence and change strategy.These are lenses to combine, not labels to memorize. A useful sequence: challenge the claim → analyze the evidence → map the system → choose a direction → test risks and scenarios → weigh value → decide → execute → reflect. Each guide is a sourced learning synthesis with an illustrative example, not a claim about a particular employer.