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1. Introduction: A Real Improvement Story In March 2025, a certain automotive component company, Huacheng Precision Engineering (a…
1. Too Many Root Cause Analysis Tools, Making Selection Difficult When a problem arises on the production floor, some people use 5…
One: 8D and QRQC: Two Systems Should Not Operate Independently Many factories use QRQC (Quick Response Quality Control) for daily …
1. Why Do Many Improvement Projects Fail to Deliver Results? A quality department at an electronics factory initiated 47 improveme…
Introduction "Every process has variation—the key is whether you can distinguish: is this normal variation, or is there a problem?…
Introduction Relying solely on the average can deceive you twice. Two work teams have an average nonconformity rate of 3%, but one…
Introduction "I think there's a relationship" and "data proves there's a relationship" are two different things. The scatter diagr…
Introduction to the Series The Seven QC Tools —— check sheets, stratification, Pareto charts, cause and effect diagrams (fishbone …
Introduction Italian economist Vilfredo Pareto discovered in 1906 that 80% of the land in Italy was owned by 20% of the population…
Introduction "Data does not lie, but those who only look at aggregated data may deceive themselves." Stratification — the most und…
Introduction "The simplest tool is often the easiest to misuse." The Check Sheet is the simplest of the Seven QC Tools. Simple eno…
1. Overview 8D (Eight Disciplines) is a team oriented, structured problem solving method that originated at Ford Motor Company and…