What the Toyota Production System is
The Toyota Production System (TPS) is the set of management practices Toyota developed between the 1940s and 1970s, largely under Taiichi Ohno and Shigeo Shingo. It's the direct ancestor of what we now call Lean Manufacturing: Lean is the generalized, Western interpretation of the system, while TPS is the original model, still in use and still evolving inside Toyota itself.
The "House" of TPS
TPS is usually drawn as a house. The roof represents the goals: best quality, lowest cost, shortest lead time. Two pillars hold up that roof: Just-in-Time (making the right part, in the right quantity, at the right time) and Jidoka (automation with a human touch: the machine or operator stops the process the moment an abnormality is detected, so defects don't move downstream). The foundation is stability — standardized work, leveled production (heijunka), and continuous improvement.
The 14 principles (Liker's model)
In The Toyota Way, researcher Jeffrey Liker organized Toyota's philosophy into 14 principles across four categories, often called the "4 P's": Philosophy, Process, People/Partners, and Problem Solving.
Long-term philosophy
Base management decisions on long-term philosophy
Prioritize long-term goals even at the expense of short-term financial results.
The right process will produce the right results
Create continuous process flow
Reduce idle time between steps to surface problems quickly.
Use pull systems
Avoid overproduction by letting actual consumption trigger replenishment (Kanban).
Level out the workload (Heijunka)
Leveled production cuts down on overload spikes and wasted resources.
Stop to fix problems (Jidoka)
Build a culture of stopping the line for defects, so quality is built in from the start.
Standardize tasks
Standardized work is the foundation for continuous improvement and employee empowerment.
Use visual control
Boards, andons, and signals that make process status visible to anyone at a glance.
Use only reliable, thoroughly tested technology
Technology should serve people and process, never the other way around.
People and partners
Grow leaders who live the philosophy
Leaders developed internally, who understand the work firsthand and can teach the method.
Develop exceptional people and teams
Invest continuously in technical and behavioral training.
Respect and develop suppliers and partners
Treat the supply chain as an extension of the company itself.
Continuous problem solving
Go see for yourself (Genchi Genbutsu)
Go to the shop floor to understand the real situation before deciding anything.
Decide slowly by consensus, implement rapidly
Consider all options thoroughly before deciding, then execute without hesitation.
Become a learning organization (Hansei and Kaizen)
Honest reflection on failure and continuous improvement as an institutional habit.
Applying it outside the auto industry
Hospitals, banks, software teams, and retailers already use adapted versions of these principles. The starting point tends to be the same: standardize current work, make problems visible with visual management, and build the habit of going to see the real process before proposing a fix — instead of deciding from a report alone.
Next: learn the waste TPS is designed to eliminate
Read the complete guide to the 8 wastes of Lean (DOWNTIME) and how to spot them in your process.
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About the author
Lean Manufacturing & Behavioral Management Specialist
Over 20 years in the automotive and metalworking industries (GM and Dana), Lean Manufacturing practitioner since 2006. SENAI instructor and mentor in Brazil’s Brasil Mais Produtivo program, delivering consulting, training and audits for 50+ companies, combining quality, productivity and people development.