This book explores how humans estimate time, effort, and complexity — and why we consistently get it wrong.

Through practical frameworks and psychological insights, it helps readers build a more accurate mental model of work, planning, and execution. The book introduces a simplified estimation framework built around four core dimensions: friction, clarity, challenge, and effort.

It is written for professionals, creators, and decision-makers who want a realistic approach to productivity — one that respects human limits while improving performance.