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Michael Mauboussin and Charlie Munger: Checklists Tame Luck

I shared earlier this week that I’m reading The Success Equation by Michael J. Mauboussin. It outlines a framework for assessing the influence of skill and luck on your decisions (many life outcomes are a combination of both) so you can increase the chances of getting a successful outcome. It’s a good book about improving your decision-making by understanding the impact of luck and skill on successful (and unsuccessful) outcomes.

As I’ve said many times, books are a great way to find other books. One of the key concepts Mauboussin discusses is that to improve your skill in activities where luck has a greater influence than skill, you must focus on the process used to make decisions. The idea is that good decisions can result in outcomes we don’t want because of the influence of luck. And vice versa: a bad decision can lead to a good outcome because you got lucky. Therefore, a decision can’t be judged by its outcome; it must be judged by the quality of the process and analysis used to make it. He goes into more detail, but that’s the gist. I agree with this.

One of the things he suggested using, because they’re effective tools to improve decision-making processes, is checklists. Charlie Munger said the same thing in Poor Charlie’s Almanack (see here). Mauboussin told the story of a doctor who used checklists to significantly reduce hospital infections and realized how powerful they are. He wrote a book about checklists and how to use them effectively called The Checklist Manifesto.

Munger and Mauboussin can’t both be wrong about checklists. I use them some already, and I want to embrace them for material decisions, especially those that involve luck. I’m going to get a copy of The Checklist Manifesto and give it a read so I can lean into what Munger and Mauboussin have both said.

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Connected Books
Poor Charlie’s Almanack

2023

January 2025

Frameworks and mental models for decision-making used by Charlie Munger. This book is a collection of speeches on mental models and psychology for making better decisions to become a better investor and live a fulfilling life. This version contains Charlie's updated thinking since the original 2005 version at the end of each chapter.