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The Decision Book

Fifty Models for Strategic Thinking

16 minMikael Krogerus, Roman Tschäppeler

What's it about

Struggling to make the right choice, whether in your career or personal life? Learn to cut through the noise and think more clearly with fifty proven models for better decision-making, used by top strategists and thinkers at Harvard, McKinsey, and beyond. This book summary unpacks powerful frameworks you can use immediately. You'll discover how to find out what you really want with the personal performance model, understand yourself and others better using the Johari window, and manage your time effectively with the Eisenhower matrix. Stop agonizing and start acting with confidence.

Meet the author

Mikael Krogerus and Roman Tschäppeler are the bestselling authors behind a globally recognized series of books that distill complex ideas into simple, visual models. Their journey began while working at a creative agency, where they developed a shared passion for finding clear, practical frameworks to solve everyday business and personal challenges. This collaboration led to The Decision Book, born from their quest to make strategic thinking accessible to everyone, not just CEOs and consultants.

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The Decision Book book cover

The Script

We treat decision-making like a high-stakes athletic event. We train for it, we strategize, we gather intelligence, and we await the perfect moment to execute with heroic confidence. The implicit belief is that better inputs—more data, more analysis, more time—will invariably lead to a better outcome. Yet, the opposite is often true. The very tools we use to achieve clarity can become the architecture of our confusion. The endless spreadsheet paralyzes, the exhaustive pro-and-con list creates a hall of mirrors, and the group brainstorming session amplifies noise instead of signal. The problem is a lack of structure. We are drowning in options but starved for a simple framework to make sense of them.

This exact frustration—the feeling of being intellectually equipped yet practically stuck—is what drove two Swiss thinkers, Mikael Krogerus and Roman Tschäppeler, to create a different kind of resource. While studying at an innovative business school, they noticed a massive gap between the complex theories taught in the classroom and the simple, visual models that actually helped people think and act. They began collecting and refining these models as practical tools for cutting through noise. Their project was about providing a curated collection of frameworks that could help anyone clarify their own thinking, whether they were deciding on a career change, a marketing strategy, or simply what to do next.

Module 1: How to Improve Yourself — Models for Action

The book presents two paths for using these models. The first is the "American" way. It's about action first, theory later. You jump in, try a tool, and learn from the results. This module focuses on frameworks you can apply immediately to improve your work and productivity.

A classic starting point is the Eisenhower Matrix. It's a simple grid for managing your time. The matrix forces you to distinguish between what is urgent and what is important. Urgent tasks demand your immediate attention. They are often reactive. Important tasks contribute to your long-term goals. They are proactive. Prioritize tasks that are important, not just urgent. Most people live in the "urgent and important" quadrant, constantly fighting fires. But real progress happens when you schedule time for what is "important but not urgent." This is the quadrant of strategic planning, relationship building, and deep work. A manager might use this to block out time for a strategic report a week before it's due. This prevents it from becoming a last-minute crisis.

From managing your time, we move to managing your projects. Use the Project Portfolio Matrix to balance your efforts across multiple goals. This is a lifesaver for anyone juggling different initiatives. You create a matrix with axes that represent your key values. For a freelancer, this might be "income generated" versus "personal fulfillment." For a product team, it could be "alignment with company vision" versus "team skill development." Plotting your projects on this grid reveals which ones are worth your energy. It helps you say "no" to projects that drain resources without moving you forward.

Okay, but how do you know if your decisions are actually working? This brings us to a powerful self-evaluation technique. Conduct a Feedback Analysis to align your expectations with reality. Here’s how it works. Whenever you make a key decision, write down what you expect to happen. Six or twelve months later, compare the actual results to your forecast. A manager might predict a new marketing campaign will boost sales by 20%. A year later, they see a 15% increase. The analysis reveals their strength is creative strategy, but their weakness is underestimating market friction. This is about systematically identifying your true strengths and blind spots.

Finally, you need a way to set goals that actually motivate you. The John Whitmore model helps with this. Distinguish between final goals and performance goals. A final goal is the ultimate outcome, like "run a marathon." It's inspiring but not directly actionable. Performance goals are the concrete steps you take to get there. These are things like "jog 30 minutes daily" or "increase my distance by 10% each week." They are specific, measurable, and within your control. This structure breaks down overwhelming ambitions into manageable daily actions. It transforms a distant dream into a clear plan.

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