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📄 24 articles in total 📅 Continuously updated 🔥 Pinned first, then sorted by rating, views and publish date
Six Sigma & Statistical Quality · Six Sigma Methodology · DMAIC Project Path

Advancing QE Skills (36) | Determining Whether Two Sets of Data Differ — Test Selection Table, Minimum Sample Size Calculation, and Equivalence Testing

A precision injection molding company changed the mold temperature and measured the critical dimensions specification 12…

Six Sigma & Statistical Quality · Six Sigma Methodology · DMAIC Project Path

The Origin of Six Sigma is Not a Statistics Textbook, but a Repair Ledger — Motorola 1986: How Bill Smith Turned 3.4 ppm into a Corporate Strategy

In 1985, a senior engineer from Motorola's Communications Division walked into the CEO's office with a stack of data. Hi…

Six Sigma & Statistical Quality · Six Sigma Methodology · Black Belt/Green Belt Mechanism & Financial Benefits

Green Belt Projects Launched in Batches, Abandoned in Batches? — A Case Study of the Rebuilding of a Green Belt Grading Management Mechanism in an Electronics Manufacturing Company

1. Forty Three Project Proposals, Only Nine Completed by Year End An electronics manufacturing company mainly producing …

Six Sigma & Statistical Quality · Six Sigma Methodology · DMAIC Project Path

One Line Recovered, Other Lines Still Paying Tuition? — Rebuilding Six Sigma Horizontal Deployment at an Auto Parts Company

1. Oil Seal Pressing Damage Cured, but Recurred in Another Workshop Six Months Later A star assembly line at an automoti…

Six Sigma & Statistical Quality · Six Sigma Methodology · Black Belt/Green Belt Mechanism & Financial Benefits

How to Calculate the Benefits of Six Sigma Projects to Gain Financial Recognition? —— A Case Study on the Rebuilding of a Benefits Accounting System in a Manufacturing Company

A certain electronics manufacturing company has been implementing Six Sigma for four years, with over fifty Black Belts …

Six Sigma & Statistical Quality · Six Sigma Methodology · DMAIC Project Path

Six Sigma Project Dying in the I Stage? —— A Case Study on Improvement Plan Screening and Piloting in an Electronics Company

1. Introduction: Smooth Sailing in the A Stage, Nearly Fatal in the I Stage At the beginning of 2025, an electronics man…

Six Sigma & Statistical Quality · Six Sigma Methodology · Black Belt/Green Belt Mechanism & Financial Benefits

Project "Completed," but Benefits Can't Withstand Scrutiny? — Case Analysis of a Rebuilt Six Sigma Project Closure Review System in an Equipment Manufacturing Company

Companies implementing Six Sigma generally focus their efforts on two ends: rigorous gatekeeping during project initiati…

Six Sigma & Statistical Quality · Six Sigma Methodology · DMAIC Project Path

Root Cause Identified, but the Solution Nearly Failed? —— A Case Study of a Six Sigma Improvement Project in an Automotive Parts Company

In the five stages of DMAIC, Define sets the direction, Measure provides the evidence, Analyze determines the understand…

Six Sigma & Statistical Quality · Six Sigma Methodology · DMAIC Project Path

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…

Six Sigma & Statistical Quality · Six Sigma Methodology · Black Belt/Green Belt Mechanism & Financial Benefits

Black Belt Projects: The More You Do, the More You Lose — A Case Study on Rebuilding the Six Sigma Project Initiation Mechanism in an Equipment Manufacturing Company

Six Sigma has been implemented for many years in a certain equipment manufacturing company, but it often encounters an a…

Six Sigma & Statistical Quality · Six Sigma Methodology · DMAIC Project Path

Six Sigma Project Stalled in the M Stage? —— A Case Study of Data Collection Plan Rebuilding in an Automotive Parts Company

1. D Stage Passed Smoothly, but M Stage Nearly Derailed the Project An automotive parts company launched a Six Sigma pro…

Six Sigma & Statistical Quality · Six Sigma Methodology · DMAIC Project Path

Why Do Six Sigma DMAIC Projects Fail to Proceed? —— A Case Study of a Manufacturing Company's Project Revival

1. Introduction: A Project Stuck in the Measure Phase for Four Months A manufacturing company initiated a Six Sigma proj…