Six Sigma: practical guides, worked calculations and shop-floor examples. Browse every article in this topic and start with the main guide.
Six Sigma DMAIC: Definition, Phases and Sigma Level Formula
Learn what Six Sigma is and how DMAIC works, with a worked example: DPU, DPMO and sigma level formulas, a conversion…
P-chart: attribute control chart with a worked example
Learn to build a p-chart for proportion defective: UCL and LCL formulas, an example with 20 samples of 100 parts and…
Gauge R&R and MSA: how to evaluate a measurement system
Understand MSA and Gauge R&R: repeatability, reproducibility, how to run the study, the %GRR calculation, the 10%…
AQL sampling: how to use the ISO 2859-1 table
Learn AQL sampling step by step: lot size, inspection level, code letter, sample size, Ac and Re numbers and normal,…
The 7 basic quality tools: what they are and how to use them
Learn the 7 basic quality tools with examples: check sheet, stratification, histogram, Pareto chart, fishbone diagram…
Cp and Cpk: how to calculate process capability
Understand Cp and Cpk with a worked example, centered vs shifted processes, what a Cpk of 1.33 means, the link to PPM…
FMEA: what it is, how to do it and how to calculate RPN
Learn FMEA step by step: severity, occurrence and detection, how to calculate the RPN, an example FMEA table, AIAG-VD…
Pareto chart: what it is, the 80/20 rule and how to make one
Learn how to make a Pareto chart with a defect example, cumulative percentage, Juran's 80/20 rule and how to use…
Statistical process control (SPC): how to use control charts
SPC on the shop floor: common vs. special causes, choosing the right control chart, calculating X-bar and R limits, a…
Lean vs. Six Sigma: What Are the Practical Differences
Understand the differences between Lean Manufacturing and Six Sigma, when to use each methodology on its own, and why ma…