Lean Blog Audio: Practical Lean Thinking, Psychological Safety, and Continuous Improvement

Inside the 1987 NUMMI Management Practices Executive Summary: Why Leadership Mattered More Than Lean Tools

13 Feb 2026

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The blog postIn this episode, I explore the 1987 NUMMI Management Practices Executive Summary — a confidential General Motors report that documented why the joint venture between GM and Toyota was succeeding so dramatically.What’s striking is how clearly GM’s own study team understood the real drivers of NUMMI’s performance. It wasn’t tools. It wasn’t discipline. It wasn’t copying Toyota’s production techniques.It was leadership.The report describes a management system built on mutual trust and respect, problem-solving at the source, quality built into the process, and supervisors acting as coaches rather than enforcers. Nearly 40 years ago, GM documented that NUMMI’s success came from management philosophy — not Lean tools.And yet, insight proved easier than action.In this episode, I walk through the document’s key sections, including NUMMI’s basic principles and five major management strategies, and reflect on why translating those lessons into broader cultural change proved so difficult.If you’re interested in Lean leadership, psychological safety, or the origins of what we now call continuous improvement, this historical document offers powerful — and still relevant — lessons.

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13:00H | 21 DIC 2025 | Fin de Semana

01 Jan 1970

Fin de Semana

10:00H | 21 DIC 2025 | Fin de Semana

01 Jan 1970

Fin de Semana

12:00H | 20 DIC 2025 | Fin de Semana

01 Jan 1970

Fin de Semana

2ª PARTE | 06 ENE 2026 | EL PARTIDAZO DE COPE

01 Jan 1970

El Partidazo de COPE

3ª PARTE | 22 ENE 2026 | EL PARTIDAZO DE COPE

01 Jan 1970

El Partidazo de COPE

3ª PARTE | 04 MAR 2026 | EL PARTIDAZO DE COPE

01 Jan 1970

El Partidazo de COPE

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Lean Blog Audio: Practical Lean Thinking, Psychological Safety, and Continuous Improvement

Inside the 1987 NUMMI Management Practices Executive Summary: Why Leadership Mattered More Than Lean Tools

This episode hasn't been transcribed yet

Other recent transcribed episodes

13:00H | 21 DIC 2025 | Fin de Semana

10:00H | 21 DIC 2025 | Fin de Semana

12:00H | 20 DIC 2025 | Fin de Semana

2ª PARTE | 06 ENE 2026 | EL PARTIDAZO DE COPE

3ª PARTE | 22 ENE 2026 | EL PARTIDAZO DE COPE

3ª PARTE | 04 MAR 2026 | EL PARTIDAZO DE COPE

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