Six Sigma Hypothesis Testing in Practice: Three Case Studies from Data Comparison to Statistical Decision Making
1. Introduction: Why Do We Need Hypothesis Testing? In September 2025, a car electronics company, Hengda Electronics a p…
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· 7/25/2026
Data Collected, but Root Cause Still Elusive? —— Case Study Analysis of a Breakthrough in the A Phase of a Six Sigma Project at an Automotive Parts Company
Many Six Sigma projects fail not in the measurement phase but in the analysis phase. The M phase involves meticulous dat…
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· 8/20/2026