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The Decision Book: Fifty Models for Strategic Thinking
Mikael Krogerus and Roman Tschäppeler
In a sentence
A compact workbook of fifty visual decision-making models drawn from business, psychology, and philosophy that help you structure complexity and make better choices about yourself, others, and the world.
The Decision Book distills fifty of the best-known and lesser-known strategic-thinking models into a hands-on workbook you can fill in, cross out, and adapt. Organized around four practical aims—improving yourself, understanding yourself better, understanding others better, and improving others—it gives you tools like the Eisenhower matrix, SWOT, the flow model, cognitive bias checklists, the prisoner's dilemma, and situational leadership. Rather than handing you answers, each model asks questions and reduces the complexity of a situation so you can concentrate on what matters. Whether you're preparing a presentation, running a performance review, choosing a partner, or reassessing a business idea, this book turns vague chaos into structured, visual, decidable problems.
The four lenses
- Science
- Statistics
- Systems
- Strategy
The model
A framework capturing how using structured decision models and simple rules, under given contextual conditions, shapes psychological states (clarity, reduced doubt, calibrated expectations) and behaviors (prompt deciding, feedback learning) that lead to better decision quality and satisfaction.
Use of Decision-Making Modelsdesign lever
The active application of simplifying, visual, question-asking frameworks to structure a complex situation, reduce it to relevant elements, and make a choice decidable.
Use of Simple Rules and Limitsdesign lever
Adoption of unconditional, hard-and-fast rules such as Stop Rules, Yes/No rules, research limits, and option-reduction that shorten information processing and prevent overthinking in decisions.
Decision Complexity and Uncertaintycontextual condition
The degree to which a decision involves ambiguous, incomplete information, hard-to-compare options, and high consequences, which conditions whether analysis or intuition is more effective.
Choice Overloadcontextual condition
The condition of having too many options under consideration, which raises expectations and worry and paradoxically reduces the likelihood and satisfaction of decision-making.
Expectation Calibrationpsychological state
The degree to which a person sets expectations at a level that is challenging yet attainable rather than excessively high or absent, affecting satisfaction and avoidance of the potential trap.
Decision Clarity and Reduced Doubtpsychological state
The psychological state of clearly seeing what matters, having distinguished important from urgent and pros from cons, and experiencing reduced ambiguity and paralysis before acting.
Cognitive Biaspsychological state
Systematic, unconscious errors of judgment such as anchoring, confirmation, availability, and fast/slow errors that distort assessment of a situation and degrade decision quality.
Self-Knowledgepsychological state
Awareness of one's own strengths, weaknesses, motivations, patterns, needs, and blind spots, gained through feedback analysis, the Johari window, and reflective models.
Feedback and Double-Loop Learningbehavioral pattern
The behavioral practice of comparing expectations with outcomes and reflecting on the values and reasons behind actions to change underlying patterns rather than just surface behavior.
Prompt Decisive Actionbehavioral pattern
The behavioral tendency to decide and act promptly under limited information rather than deferring, recognizing that non-decision is itself a decision with consequences.
Situational Leadership and Team Fitdesign lever
The adaptation of leadership style to employee competence and commitment, and the matching of team skills to goals, in order to develop and improve others effectively.
Decision Quality and Satisfactionoutcome metric
The ultimate outcome of making good, well-fitted decisions that lead to effective action, reduced regret, and greater satisfaction with the choices made and their results.
Personal Well-Being and Flowoutcome metric
The state of happiness and satisfaction achieved when engaged in freely chosen, appropriately challenging activities with clear goals and immediate feedback, and when living aligned with self-knowledge.
How they connect
- use of decision models → predicts decision clarity
- use of simple rules → predicts prompt decisive action
- decision clarity → predicts prompt decisive action
- prompt decisive action → influences decision quality
- choice overload − predicts decision quality
- use of simple rules − influences choice overload
- expectation calibration → predicts decision quality
- expectation calibration → influences personal wellbeing
- cognitive bias − moderates decision quality
- decision complexity → moderates decision quality
- feedback learning → predicts self knowledge
- self knowledge → influences decision quality
- self knowledge → predicts personal wellbeing
- feedback learning − influences cognitive bias
- situational leadership → influences decision quality
- use of decision models → predicts self knowledge
The story
The reader A busy professional or thoughtful individual who must constantly make decisions—big and small—and wants a reliable way to structure, analyze, and act on them.
External problem
Facing chaotic, complex, and ambiguous choices without a clear method to weigh options and decide.
Internal problem
Feeling overwhelmed, indecisive, doubtful, and afraid of making the wrong choice.
Philosophical problem
Life demands decisions, and drifting or deferring—pretending indecision is neutral—wastes your agency and lets others or circumstance decide for you.
The plan
- Pick the entry point that fits you—trial-and-error (improve yourself) or theory-first (understand yourself).
- Choose a model that matches your question: efficiency, self-knowledge, understanding others, or leading others.
- Copy out and fill in the model with your real situation, treating it as a set of questions.
- Interpret the visual result, decide promptly, and communicate the decision.
- Later, compare expectations with outcomes and revise using feedback and double-loop learning.
Success
- You work more efficiently, decide faster and more confidently, know your strengths, and understand and lead others well while staying responsible for your own values.
At stake
- You stay stuck in chaos and doubt, defer decisions unconsciously, repeat mistakes, and let unimagined risks or others' opinions determine your fate.
Questions this book answers
- How do I make the right decision, especially under uncertainty and time pressure?
- How can I distinguish what is important from what is merely urgent?
- How can I understand myself, my strengths, my motivations, and my patterns better?
- How can I understand, influence, and lead other people more effectively?
- When should I trust intuition versus deliberate analysis, and when should I revise a decision?
Glossary
- Use of Decision-Making Models
- The active application of simplifying, visual, question-asking frameworks to structure a complex situation and make a choice decidable.
- Use of Simple Rules and Limits
- Adoption of unconditional rules and preset limits that shorten information processing and prevent overthinking.
- Decision Complexity and Uncertainty
- The degree to which a decision involves ambiguous information, hard-to-compare options, and high consequences.
- Choice Overload
- Having too many options such that expectations and worry rise and decision likelihood and satisfaction fall.
- Expectation Calibration
- Setting expectations at a challenging yet attainable level rather than excessive or absent.
- Decision Clarity and Reduced Doubt
- The state of clearly seeing what matters and experiencing reduced ambiguity and paralysis before acting.
- Cognitive Bias
- Systematic unconscious errors of judgment such as anchoring, confirmation, availability, and fast/slow errors.
- Self-Knowledge
- Awareness of one's strengths, weaknesses, motivations, patterns, needs, and blind spots.
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