Most Lean Six Sigma trainings end with an exam. This one ends with a result.
Learn Lean Six Sigma on a real improvement project from your own job. Every lesson moves your project one step forward, and a Master Black Belt reviews your finished project for your Green Belt certificate.
- 80 hours
- 27 DMAIC steps
- 12 months access
- from €497
What a finished project looks like
OTIF %, weekly · I-chart- Format
- Online, self-paced or in a cohort
- Effort
- About 80 hours, 3 to 6 h per week
- Duration
- Typically 3 to 6 months
- Live sessions
- 6 Study Halls with Collaborate
- Language
- English and German
- Certificate
- Green Belt by SKILLAGILITY
- Access
- 12 months, extended if needed
- Next start
- Core: anytime · Cohort: 1 Feb 2027
You learn the tools. Then Monday comes.
Theory without a project
Days in a seminar room, case studies from other companies, and a multiple-choice exam at the end. Your own process never gets touched.
Tools learned, never applied
Hypothesis tests and capability studies feel clear in class. Three weeks later, with your own messy data, nothing looks like the slide.
Nobody to ask
The moment you get stuck is the moment the training is over. So the project stalls, and the certificate goes into a drawer.
This course flips the order: you bring a real problem on day one, and you finish with a completed project, a measurable result and a coach who has seen it through with you.
Learning powered by your own project
Your workplace
You learn where the problems are: in your process, with your data, your team and your customers.
Your project
A real improvement project carries you through all five DMAIC phases, from problem statement to control plan.
The course
Short lessons, toolkits and a community of fellow learners, plus live Study Halls and 1:1 coaching whenever your project needs more.
The SKILLSTER way: Instant application. Lasting success.
Learning that doesn’t leave you alone
Visual, bite-sized lessons
Short units with clear diagrams and one real case you follow from problem to result.
An activity after every concept
Apply it to your project, share your result, discuss with peers or reflect on your learning.
Coaching when you need it
Book 1:1 sessions with a Master Black Belt at any tollgate, or add a Coaching Pack for your whole project.
A certificate that counts
A Master Black Belt reviews your completed project. Your Green Belt proves you delivered, not just that you passed a test.
6 live Study Halls
With Collaborate: no lectures. You bring your questions, and we work through them with extra examples and exercises.
An active community
Share progress, ask questions and learn from other participants working on their own projects.
Toolkit included
Templates, checklists and tool guides you can use in your project right away and keep using afterwards.
Your own pace
Short units fit into a busy working week. Your project sets the rhythm, not a seminar calendar.
Five steps from first idea to Final Tollgate
- Week 0
Choose your way
Start any time with Core, or join the next Collaborate cohort and learn together with a group.
- Week 1
Write your project brief
Describe your project idea on one page, using our template.
- Week 1–2 · live
Kick off your project
Sharpen scope and goal in the Kick-off Study Hall, or in a 1:1 session with your coach. Your sponsor is welcome to join.
- Weeks 1–26
Apply what you learn
Every DMAIC phase moves your project forward, with each tool applied to your own process and data.
- Final Tollgate
Submit your results
Your project documentation is your practical exam. A Master Black Belt reviews it and awards your Green Belt certificate.
Is your project a good fit?
Answer five quick questions. If you can say yes to all of them, your project is made for Lean Six Sigma.
Not sure yet? Bring your idea to the Kick-off Study Hall, or book a 30-minute 1:1 session and we check it together.
- 1Is there a problem significant enough to be worth solving?No → a different approach fits better
- 2Is the problem linked to a process?No → a different approach fits better
- 3Can the process be measured, with data or KPIs?No → a different approach fits better
- 4Do the process and its output repeat regularly?No → a different approach fits better
- 5Is the solution still unknown?No → just implement it
27 steps through DMAIC
Each phase ends with a tollgate: you check your results against a clear checklist before you move on. Want a second pair of eyes? Add a 1:1 tollgate session with your coach.
| Phase | Steps | Weeks | What you do | What you have at the end |
|---|---|---|---|---|
| Define | D1–D6 | 1–5 | Frame the problem, capture the Voice of the Customer, map the process, build the business case | A signed-off project charter |
| Measure | M1–M8 | 6–12 | Plan data collection, validate your measurement system, set the baseline and process capability | Reliable data and a clear baseline |
| Analyze | A1–A5 | 13–17 | Find and verify root causes with Pareto, Fishbone, correlation, regression and hypothesis tests | Root causes proven by data |
| Improve | I1–I4 | 18–21 | Generate and select solutions, apply Lean tools, pilot and compare against the baseline | A tested solution with measured impact |
| Control | C1–C4 | 22–26 | Sustain the gains with control plans, control charts and standardization | A stable process and a documented result |
| Final Tollgate | — | 27 | Submit your project documentation for review, and share it with your sponsor | Your Lean Six Sigma Green Belt certificate |
Skills you prove on your own process
Scope a project with a clear problem statement, a SIPOC and a business case your sponsor signs off
Turn the Voice of the Customer into measurable requirements
Collect reliable data, check your measurement system and calculate process capability
Separate the vital few causes from the trivial many with Pareto, Fishbone and hypothesis tests
Use correlation and regression to understand what really drives your process
Generate, evaluate and select solutions with structured tools such as the Pugh Matrix
Combine Six Sigma with Lean: the 7 Wastes, Theory of Constraints and value stream thinking
Secure your results with control plans, control charts and Poka-Yoke
Put a price tag on poor quality and show your savings in euros, hours or capacity
Your Return on Learning
A Green Belt should pay for itself. That is why we measure success on three levels.
Output
What you complete
- Around 80 hours of practice-based learning
- 6 tollgates passed against clear criteria
- Your Green Belt certificate by SKILLAGILITY
Outcome
What you can do
- Lead an improvement project using DMAIC
- Make decisions based on data, not opinions
- Apply every tool with confidence, already tested in your own job
Impact
What your organization gains
- Hard savings and lower costs of poor quality
- Higher productivity and freed-up capacity
- More safety, transparency and motivated teams
Proven, not guessed. A data-based baseline, statistically verified root causes and a before-and-after comparison, secured by a control plan.
A certificate that proves you delivered
Lean Six Sigma Green Belt by SKILLAGILITY
Awarded after a Master Black Belt has reviewed your completed project. Included in Collaborate, available as an add-on with Core.
ASQ Body of Knowledge
The curriculum follows the ASQ Six Sigma Body of Knowledge. You can also take the ASQ Certified Six Sigma Green Belt exam; registration and fees are handled directly by ASQ.
Path to Black Belt
Depending on your project’s scope, combine B303 with Value Stream Mapping (B301), Lean Management (B302) and Modern Project Management (T206) to reach Black Belt level.
Stefan Lachmann
Stefan brings more than 20 years of experience in Operational Excellence, training and coaching improvement teams in industry and logistics. He reviews every Green Belt project personally, leads the live Study Halls and is available for 1:1 coaching whenever your project needs it.
- Master Black Belt
- MBA · Diplom-Kaufmann
- ICF-certified Coach (PCC)
- ICF-certified Team Coach (ACTC)
- Associate Lecturer, Open University Business School
Classroom quality, without leaving your job
| Classroom Green Belt | Self-paced e-learning | SKILLAGILITY B303 | |
|---|---|---|---|
| Time away from work | Typically 7 to 10 seminar days | None | None. Short units, your own pace |
| Own project | Usually after the seminar, on your own | Rarely required | Built in from day one |
| Personal coaching | Limited during seminar days | None | Bookable 1:1 with a Master Black Belt |
| Help when you’re stuck | Until the seminar ends | Forum or email | Community and 6 live Study Halls with Collaborate |
| Certificate based on | Exam, sometimes plus project report | Online exam | Your completed project |
| Typical price (net) | €3,450 to €5,330 | Low | €497 self-paced, €1,497 in a cohort |
Classroom prices based on published German providers (e.g. DGQ, TÜV Rheinland) as of September 2026. Offers vary; always compare current terms.
Fixed start dates, flexible pace
Two cohorts a year, six live Study Halls each. Prefer to start right away? Core is open any time.
- Course startMon, 1 Feb 2027
- Study Hall 1: Kick-offThu, 4 Feb 2027
- Study Hall 2: DefineThu, 11 Mar 2027
- Study Hall 3: MeasureThu, 22 Apr 2027
- Study Hall 4: AnalyzeThu, 3 Jun 2027
- Study Hall 5: ImproveThu, 1 Jul 2027
- Study Hall 6: ControlThu, 19 Aug 2027
- Course startMon, 6 Sep 2027
- Study Hall 1: Kick-offThu, 9 Sep 2027
- Study Hall 2: DefineThu, 28 Oct 2027
- Study Hall 3: MeasureThu, 25 Nov 2027
- Study Hall 4: AnalyzeThu, 13 Jan 2028
- Study Hall 5: ImproveThu, 10 Feb 2028
- Study Hall 6: ControlThu, 9 Mar 2028
Choose how you want to learn
Same course, same toolkits, same focus on your own project. The difference is how much company you want along the way.
CoreAt your own pace€497 one-time, netStart with Coreor pay 2 × €248.50 |
RecommendedCollaborateWith a cohort€1,497 one-time, netJoin the next cohortor pay 3 × €499 | |
|---|---|---|
| Learning | ||
| Learning hoursPractice-based, on your own project | ~80 h | ~80 h |
| 27 DMAIC stepsShort lessons, one real case from problem to result | ✓ | ✓ |
| Start | Any time | February or September |
| AccessIncluding all updates | 12 months | 12 months |
| SKILLAGILITY toolkits and glossaryTemplates, checklists and tool guides | ✓ | ✓ |
| Interaction | ||
| Interactive engagement with the communityActivities after every concept, chat and forum | ✓ | ✓ |
| Live Study Halls90 min, questions sent in advance, recorded | — | 6 sessions |
| Learning together with a cohortA group that keeps you moving | — | ✓ |
| Certificates | ||
| Certificate of completion | ✓ | ✓ |
| Lean Six Sigma Green BeltBased on your completed project, reviewed by a Master Black Belt | + €297 | ✓ |
| Lean Six Sigma Black BeltCombine B303 with B301, B302 and T206 | — | Option |
| Add-ons | ||
| Coaching Pack6 × 30 min 1:1 with a Master Black Belt, for example one per tollgate | + €450 | + €450 |
| One-time paymentPlus VAT where applicable | €497 Start with Coreor pay 2 × €248.50 | €1,497 Join the next cohortor pay 3 × €499 |
Training a team? Get your own cohort.
A private cohort for your organization, Study Hall dates that suit your team, optional live online or on-site sessions and certificate reviews for all participants. One invoice, one contract.
An honest fit check
This course is for you if
- You work in operations, logistics, production, quality or services
- You have a recurring problem that costs time, money or nerves
- You want to solve it with data instead of opinions
- You can invest around 3 to 6 hours per week
It is probably not for you if
- You only want a certificate without doing a project
- You already know the solution and just need to implement it
- You are looking for a one-week crash course
Frequently asked questions
Getting started
Do I need prior knowledge of Lean Six Sigma or statistics?
No. The course starts from the basics and explains every tool step by step. Basic comfort with numbers and Excel is enough.
What is the difference between Core and Collaborate?
Both give you the full course, interactive engagement with the community, all toolkits and 12 months of access. Core lets you start any time and learn entirely at your own pace. Collaborate adds a cohort start, 6 live Study Halls and the review for your Green Belt certificate, and opens the option to continue toward Black Belt.
Do I need my own project?
Yes, and that's the point. Your project is the vehicle for everything you learn. In Collaborate, the Kick-off Study Hall helps you shape it. With Core, you can book a 1:1 session with your coach whenever you like.
What if I don't have a suitable project yet?
Start with the five-question fit check above. Most participants spot good candidates in their own work within the first week. Still unsure? Book a 30-minute 1:1 session and we look at your ideas together.
When does the next cohort start?
Collaborate cohorts start twice a year, in February and September. Core starts whenever you are ready.
Time and pace
How much time should I plan?
The course comprises around 80 hours of practice-based learning, including your project work. Spread over three to six months, that's roughly 3 to 6 hours per week, and much of it is time you'd spend on the improvement work anyway.
How long does the course take?
Most projects take between three and six months, but there is no fixed deadline. Real projects depend on data, people and decisions in your organization, and sometimes that takes longer.
What if I finish earlier?
No problem, that's fully supported. You move through the phases at your own speed. In Collaborate, the cohort plan only sets the dates for the Study Halls. If you're ahead of the group, bring your questions to the next Study Hall or book a 1:1 session.
What if my project stalls or gets stopped?
It happens, even to experienced Belts: priorities shift, a sponsor changes or a tollgate isn't approved internally. That's not a failure. You decide whether to pause, adjust the scope or continue with a different project, and a 1:1 session with your coach can help you make that call.
How long do I have access?
You have 12 months of access to the course and to all SKILLAGILITY toolkits, including every update. If your project takes longer, we simply extend your access free of charge. That's only fair.
Support
What happens if I get stuck?
You're never on your own: a community of fellow learners, toolkits for every step, live Study Halls with Collaborate, and 1:1 coaching you can book whenever you need it.
Do I have to attend the Study Halls?
No, they're optional, but highly recommended. Study Halls are part of Collaborate. Each Study Hall runs three times on the same day, in German and in English, so you can pick the session that fits your time zone. All Study Halls are recorded, so you can watch them later if you can't join live.
What happens in the Kick-off Study Hall?
In week 1 of your cohort, you bring your one-page project brief. Together with the group, we sharpen scope, goal and key figures, so you start your project with a clear direction.
Does my manager need to be involved?
It helps, but it's optional. Got a sponsor? Invite them to your project kick-off and share your final project report with them to keep everyone aligned. Learning on your own works just as well.
What language is the course in?
Everything is available in English and German: course materials, toolkits, Study Halls and coaching.
What do I need technically?
A computer with an internet connection and Excel or a comparable spreadsheet tool. A headset and webcam are helpful for coaching sessions. No additional statistics software is required.
Certificate and next steps
What certificate do I receive?
After completing your project and passing the certificate review, you receive the Lean Six Sigma Green Belt certificate by SKILLAGILITY. The review is included in Collaborate and available as an add-on with Core. It confirms not only what you know, but that you delivered a real project.
Is the course aligned with international standards?
Yes. The curriculum follows the ASQ Six Sigma Body of Knowledge. If you'd like an additional external certification, you can take the ASQ Certified Six Sigma Green Belt exam. Registration and fees are handled directly by ASQ.
Can I continue toward Black Belt level?
Yes. This course is part of the SKILLAGILITY learning landscape. Depending on your project's scope, combine it with Value Stream Mapping (B301), Lean Management (B302) and Modern Project Management (T206) to reach Lean Six Sigma Black Belt level.
Price and booking
What does it cost?
Core costs €497, Collaborate €1,497, plus VAT where applicable. You can add a certificate review (€297, included in Collaborate) and a Coaching Pack with 6 × 30 minutes (€450). Company cohorts are priced on request. You can also pay in interest-free monthly installments: 2 installments for amounts up to €500, 3 installments above.
How do I book coaching and my certificate review?
Directly on your course page, in the section “Coaching & certificate review”. A course coaching session (30 min) costs €150, with 50 % off for course participants. With the Coaching Pack, the certificate review or Collaborate, you receive a personal code by e-mail after purchase: pick a time and enter the code at checkout.
What if a cohort does not fill up?
Collaborate starts with at least 4 participants. If a cohort does not fill up, you can move to the next cohort or switch to Core and get the price difference refunded.
Is VAT charged?
All prices are net. VAT is added at checkout where required, for example for customers in Germany. For customers outside Germany, VAT may not apply.
Can my employer pay for the course?
Yes. We issue an invoice to your company. And with a real project result, your employer sees a measurable return on their investment.
Do you offer options for teams?
Yes. With Corporate, your organization gets its own cohort, with Study Hall dates that suit your team and optional live or on-site sessions. Contact us for a tailored offer.
Can I cancel my booking?
After booking, you have a 14-day right of withdrawal from the date of purchase. Tip: if you book Collaborate shortly before your start date, this period also covers your first week in the course and the Kick-off Study Hall.
Bring one problem. Leave with a result.
Start today with Core, or join the next Collaborate cohort on Monday, 1 February 2027.