Toyota Production System Achieving Industry-Lowest Defect Rates Through Built-In Quality
Toyota achieved 133 defects per 100 vehicles on Lexus, 29% below industry average, via built-in quality.
Toyota Motor Corporation, a Large Enterprise Manufacturing company, created value through Quality and Reliability.
Toyota began developing its production system in the 1940s and 1950s under the leadership of Taiichi Ohno and Shigeo Shingo. The context was scarcity: post-WWII Japan had limited capital and materials, forcing Toyota to eliminate all forms of waste rather than relying on mass-production buffers. American automotive manufacturers of the era used "inspect and repair" quality models — defective parts moved down the assembly line and were caught and fixed at a final inspection station, accepting rework as a cost of production. This approach buried defects in large batches, made root-cause identification difficult, and drove high warranty costs. Toyota's challenge was to build vehicles at competitive cost and quality with far less capital than General Motors or Ford — requiring a fundamentally different approach to quality management.
Toyota built quality directly into the production process through two complementary systems:
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