Ohno visited US supermarkets and watched customers take only what they needed, and the store restocked only what was taken. He thought: Why can’t a factory do that? Thus, Kanban (pull system) was born. Instead of pushing parts forward, a downstream process would "pull" from upstream.
The organization institutionalized learning: problem-solving routines, A3 thinking (clear, concise reports of problem–analysis–countermeasure), and structured training built capability. Leaders emphasized long-term thinking, experiment-driven improvements, and humility—practices that let the system adapt across decades and geographies.
The earliest "PDF" you might find on this subject (even if only as a historical scan) begins not with cars, but with looms. Sakichi Toyoda, a brilliant inventor and industrialist, developed the automatic power loom. His key innovation, documented in early Japanese patent records (now digitized as PDFs), was the Jidoka principle—automation with a human touch. the evolution of a manufacturing system at toyota pdf
Evolution Point #1: The system evolved from a textile logic (stop, fix, don’t produce defects) to an automotive logic.
Defects were no longer an accepted cost of doing business. Quality was moved upstream through poka-yoke (error-proofing) devices, jidoka (autonomation) that stopped machines on fault, and standardized work that reduced variation. The organization embraced root-cause thinking: when a problem occurred, teams dug deeper rather than applying quick fixes. Over time, defect rates dropped and fewer resources were consumed in inspection and rework. Ohno visited US supermarkets and watched customers take
When the system spread to plants around the world, it adapted to local cultures and constraints while preserving core principles: eliminate waste, build quality in, respect people, and pursue continuous improvement. Local teams blended Toyota’s routines with regional practices, creating diverse yet coherent implementations of the manufacturing system.
This is where the PDFs get technical. By the 1960s, Toyota had a working system, but it was still a messy collection of tools. The evolution came in formalizing two pillars: Evolution Point #1: The system evolved from a
The 1973 oil crisis was TPS’s coming-out party. While other automakers bled cash from massive inventory they couldn’t sell, Toyota turned a profit. The rest of the world suddenly wanted that PDF.
By the 1980s, MIT researchers coined the term "Lean Production" (documented in the famous IMVP study). The PDFs from this era focus on benchmarking: Why did Toyota’s assembly line have half the defects, half the space, and 10x the product variety?
The PDF likely traces Kanban from its primitive state (1940s: "just-in-time" for looms) through to a sophisticated information network:
Evolutionary lesson: Kanban didn't appear fully formed. It mutated from supermarket logic, was selected for survival during oil shocks, and was retained via Toyota’s supplier association (Kyohokai).