Lean Six Sigma is a method for improving how work gets done. "Lean" removes waste and delay; "Six Sigma" reduces variation and defects using data. Together they give you a structured way — called DMAIC — to take a real problem and fix it so it stays fixed.
Because a general AI explains Six Sigma — Sigma Belt Works applies it to your actual problem and holds you to the standard. It keeps the full context of your project across every phase, works your analysis correctly and to the recognised references rather than guessing, and reviews your finished project against the belt requirements, telling you what's solid and what isn't. A blank chat window forgets your project between sessions, will confidently hand you the wrong statistical test, and will tell you your work is great no matter what. This is the difference between reading about a method and being coached through doing it properly.
Yes — that's the whole point. You apply everything to a real problem from your own work, using your own data, so you finish with a genuine improvement rather than a textbook exercise. If your data is sensitive, you can anonymise it as you enter it and still complete the full project.
Yes, and you stay in control of what you put in. If a project involves confidential information, you can anonymise your data as you enter it, so sensitive names and identifiers never need to go into the platform. Your account and your project work are stored securely in the EU and tied to your own login; you can download your project at any time, and you can ask us to delete it. Payments are handled by Paddle as merchant of record, so we never see or store your card details. Full detail is in our Privacy Notice.
No. Sigma Belt Works is a fully self-service, AI-powered platform, and the coach is an AI coaching tool available on demand — there's no human tutoring, consulting or grading involved. That's exactly what lets it work with you instantly, at any hour, at your pace.
You don't earn it by watching lessons. You earn it by completing a real Define-Measure-Analyze-Improve-Control project on your own problem, reviewed against the belt standard until the analysis holds up. You walk away with a Certificate of Completion and — more to the point — a documented improvement you can show your employer.
White Belt is a free introduction to the language and ideas of Lean Six Sigma. Yellow Belt teaches you to define a problem, map a process, find root causes, and measure performance with real tools. Green Belt adds statistical analysis — control charts, process capability, and hypothesis testing — to prove what's driving a problem and confirm your fix works.
No. White and Yellow Belt assume no prior knowledge. The tools introduce the numbers gently, and the AI coach explains each step in plain language as you work through your own project.
Yes. White Belt is free with no card required — it's the front door. You only pay if you choose to continue to Yellow or Green Belt.
You earn a Sigma Belt Works Certificate of Completion for each belt you finish. Sigma Belt Works is an independent training provider and is not currently affiliated with ASQ, IASSC, or other certification bodies. More importantly, you finish with a completed improvement project of your own.
As you work through your project, an AI coach reviews what you enter — your problem statement, process map, data, and analysis — and gives you feedback and guidance, the way a mentor would. It's AI-guided support, available whenever you're working.
Yes. Sigma Belt Works is built for applying Six Sigma to real operations, which makes it a strong fit for teams — for example in BPO, call centres, and service operations — where each person can take on a real improvement in their own area. Get in touch about team access.
Yes. You can anonymise any confidential data before entering it, and your work is handled in line with our Privacy Notice (POPIA and GDPR). Your project is yours.
It's self-paced. The lessons are short; the real time goes into working your own DMAIC project — which is the point. You're producing a genuine improvement, not rushing to a quiz.
DMAIC is the five-step Lean Six Sigma roadmap: Define the problem, Measure how the process performs today, Analyse the data to find root causes, Improve the process, and Control it so the gains hold. Every Sigma Belt Works project follows it.