A mental model by Martin Eriksson
The Decision Stack
Strategy doesn't fail because people aren't thinking hard enough. It fails because the thinking is scattered. The Decision Stack gives it five connected layers that hold from boardroom to backlog.
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Read the book
The Decision Stack by Martin Eriksson. Pragmatic, opinionated, and short enough to read in a weekend — the model articulated as a guide you can apply Monday morning.
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Lunastak — your second brain for strategic clarity. A free agentic product that helps leaders turn scattered thinking into actionable strategy.
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What's in the stack
Vision
Where you're going.
One sentence that aligns the room.
Strategy
How you'll get there.
Coherent choices to reach the vision.
Objectives
What you're measuring.
Each with one metric that matters and an aspiration.
Opportunities
What you'll try.
Testable hypotheses with belief statements and success signals.
Principles
How you'll execute.
“X even over Y” — the decisions that reveal your real priorities.
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