Art of Lean

Topics

One Toyota Production System subject, covered in depth — explained in clear, self-contained points, each one traced to its source. Need a quick definition of a single term instead? See the TPS Encyclopedia.

Chief Engineer (Shusa)

主査

Toyota's system of giving one senior engineer total accountability for an entire vehicle program — concept, quality, cost, and market success — while deliberately withholding line authority over the functional engineers who do the work. The chief engineer integrates the whole vehicle through technical depth, drawing sign-off, and persuasion rather than rank.

Heijunka

平準化

Heijunka is the leveling of production volume and product mix over a fixed period so that mura is removed and the rest of the Toyota Production System can function.

Hoshin Kanri

方針管理

Toyota's strategic management system that aligns an organization around a vital few breakthrough objectives through PDCA, two-way catchball dialogue, and operational audits.

Jidoka

自働化

One of the two pillars of the Toyota Production System: equipment and people detect abnormalities, stop or signal immediately, prevent defects from continuing, and trigger human response and improvement.

Kaizen

改善

What kaizen actually is at Toyota — daily improvement by every person, working from a standard, not a week-long event or a cost-cutting drive. Where it came from, how it really works, and how good ideas spread across the company.

Kanban and the Pull System

かんばん / プル方式

Kanban (かんばん) and the pull system explained plainly — what a kanban is, how the production and withdrawal cards run a supermarket loop, where the method came from at Toyota, and why pull exposes instability rather than fixing it.

Standardized Work

標準作業

Toyota standardized work — the three-element production method built from takt time, work sequence, and standard work-in-process, the forms that document it, and how it differs from a generic SOP.

Takt Time

タクトタイム

The demand pace expressed as a time interval — available production time divided by customer demand — around which a process is designed, staffed, and synchronized.

The Seven Wastes

七つのムダ

Taiichi Ohno's seven wastes, explained plainly — what each waste is, why overproduction is the root of all the others, where the idea came from, and how Toyota removes each one.