Reclaiming the Toyota Production System: My Lean TPS Journey of Learning, Teaching, and Leadership

Lessons in Lean TPS History and Practice visual showing David Devoe’s Toyota training, Japan immersion, and Jishuken leadership development through Lean TPS Basic Training.
Lessons in Lean TPS History and Practice shares how Toyota’s principles of Continuous Improvement and Respect for People shaped modern Lean TPS. Through Japan-based training and North American Jishuken experience, this story shows how structure, discipline, and leadership accountability turn TPS from a system of tools into a culture of learning and improvement.

My journey with the Toyota Production System began at Raymond Industrial Equipment in Brantford, Ontario. Those early years shaped my understanding of how discipline, structure, and leadership accountability create stability and continuous improvement. Later, through Toyota-led Jishuken activities across North America, I learned to see waste, design flow, and build systems that connect people and process. These experiences defined what I now call Lean TPS, the Thinking People System.

At Raymond, Standardized Work, Takt Time, and the habit of Genchi Genbutsu were not abstract ideas. They were daily routines that built stability. Leaders were expected to go and see, support problem solving, and develop people through structured practice. This was not about awareness; it was about ability. The two pillars of TPS, Continuous Improvement and Respect for People, were made visible through action. Everyone was responsible for seeing problems and taking part in improvement.

In Japan, my understanding deepened. Training began with observation at the Gemba. We studied time, motion, and balance, learning to separate fact from opinion. Tools such as the Yamazumi Board and Standardized Work Combination Table were used to make time visible and uncover waste. Respect for people meant giving members authority to stop processes, correct issues, and take part in Kaizen. Leaders were trained to teach through doing, not by lecture. The lessons were simple but powerful: stability first, flow second, and improvement always.

Jishuken, Toyota’s method for leadership development through self-initiated study, was where these lessons became real. In North America, I joined cross-functional teams that studied actual processes, identified gaps, and tested countermeasures. The work was hands-on. Each study deepened capability and strengthened the ability to sustain improvement. Jishuken turned problem solving into leadership training and taught us that stability and respect cannot be separated. When leaders engage directly, problems surface, and improvement becomes natural.

When Toyota idled the Brantford facility in 2010, it marked a turning point in my career. I chose to dedicate myself to teaching and carrying forward the discipline of Lean TPS. Across industries such as aerospace, construction, and medical devices, I have seen the same truth: Lean TPS succeeds when leaders accept responsibility for structure and stability. Without leadership, 5S becomes cleaning, Standardized Work becomes paperwork, and A3 becomes reporting. With leadership, they become tools for learning, coaching, and building capable teams.

The Toyota Production System has survived war, economic collapse, automation, and a global pandemic because its principles do not change. Continuous Improvement and Respect for People are not optional values. They are the system. They define how work is done, how people learn, and how organizations sustain excellence.

Lean TPS is not about copying Toyota’s tools. It is about understanding why the system works and applying that thinking with integrity. The goal is not perfection but progress, built every day by people who learn and lead at the same time.

Industrial Engineering and Toyota Production System comparison showing governance, stop authority, and no continuation under abnormal conditions in Mixed-Model Human–Humanoid environments
Industrial Engineering develops system capability through analysis and optimization. The Toyota Production System governs execution in Mixed-Model Human–Humanoid environments by enforcing stop authority and preventing continuation under abnormal conditions.
Governance as the missing link in continuous improvement systems showing standard operating procedures, visual control, Andon stop, Jidoka, and required leadership response to protect Quality
Continuous improvement systems fail when governance is absent. Standard operating procedures, visual control, Andon, and Jidoka must function together to stop execution, require leadership response, and protect Quality at the source
Toyota Production System Quality progression showing governing conditions, abnormality detection, and enforced response across operations
Quality in the Toyota Production System governs execution. Work continues only when conditions are met, abnormality is visible, and response is required.
Diagram illustrating Jishuken as deliberate buffer reduction within Lean TPS governance, showing how reduced manpower, inventory, and cycle time expose management behavior and test Quality protection under disciplined control.
Improvement without governance amplifies variation. Jishuken deliberately reduces buffer to expose whether leadership discipline can protect Quality under tighter operating conditions. Stability under compression confirms governance maturity.
Lean TPS Swiss Cheese Model showing four aligned cheese slices representing Organizational Systems, Leadership Governance, Task Conditions, and Point of Execution, with layered penetration paths demonstrating Quality containment.
A visual representation of the Lean TPS Swiss Cheese Model™, demonstrating how layered governance architecture progressively protects Quality from Organizational Systems through to Point of Execution.
Lean TPS Governance Architecture diagram showing 5S as environmental control supporting Standardized Work, Heijunka, Just In Time, and Jidoka to protect Quality.
5S is not housekeeping. It is the environmental control layer inside Lean TPS governance that stabilizes operating conditions, strengthens Standardized Work, and sharpens Jidoka response to protect Quality at the source.