Dantotsu Quality for Tech

Exploring how Toyota’s radical quality mindset can improve the way we build software


What is Dantotsu quality?

Dantotsu (断トツ) means “extreme”, “radical”, “unparalleled”. At Toyota, Dantotsu quality aims for radical improvement, not marginal gains.

“Many companies seem to be in trouble because product quality is not getting better despite company-wide [...] “quality first” policy”
Sadao Nomura

If this quote resonates with you, you’re in the right place.
This page is a hub for the work in progress exploration of how we can transpose Dantotsu quality philosophy to software engineering.


Mental models

A few printable mental models to challenge common coding mistakes

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Where these ideas come from

“The Toyota Way of Dantotsu Radical Quality Improvement” by Sadao Nomura.

Discover the book →

Business case

Over six months, we reduced software defects by more than 10x on a new integrated IT system for a corporate restaurant operator.

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