B303 · Lean Six Sigma · English & German

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
Baseline82%
After Control95%
Projected saving€21.6k/mo
Daniel Reed’s OTIF at Meridian Industrial Supply, the case you follow in the course: baseline 78 to 85% (mean 82%), stable at 95% after Control. Weekly points and control limits calculated for this chart from the case figures.
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
The problem with most Lean Six Sigma trainings

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.

B303

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.

How learning works here

Learning powered by your own project

Classroom

Your workplace

You learn where the problems are: in your process, with your data, your team and your customers.

Vehicle

Your project

A real improvement project carries you through all five DMAIC phases, from problem statement to control plan.

Support

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.

What you get

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.

Your path

Five steps from first idea to Final Tollgate

  1. Week 0

    Choose your way

    Start any time with Core, or join the next Collaborate cohort and learn together with a group.

  2. Week 1

    Write your project brief

    Describe your project idea on one page, using our template.

  3. 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.

  4. Weeks 1–26

    Apply what you learn

    Every DMAIC phase moves your project forward, with each tool applied to your own process and data.

  5. Final Tollgate

    Submit your results

    Your project documentation is your practical exam. A Master Black Belt reviews it and awards your Green Belt certificate.

Before you start

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.

  1. 1
    Is there a problem significant enough to be worth solving?No → a different approach fits better
  2. 2
    Is the problem linked to a process?No → a different approach fits better
  3. 3
    Can the process be measured, with data or KPIs?No → a different approach fits better
  4. 4
    Do the process and its output repeat regularly?No → a different approach fits better
  5. 5
    Is the solution still unknown?No → just implement it
Five times yes? It’s a DMAIC project. Your project is a great fit for this course.
Curriculum · aligned with the ASQ Six Sigma Body of Knowledge

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.

PhaseStepsWeeksWhat you doWhat you have at the end
DefineD1–D61–5Frame the problem, capture the Voice of the Customer, map the process, build the business caseA signed-off project charter
MeasureM1–M86–12Plan data collection, validate your measurement system, set the baseline and process capabilityReliable data and a clear baseline
AnalyzeA1–A513–17Find and verify root causes with Pareto, Fishbone, correlation, regression and hypothesis testsRoot causes proven by data
ImproveI1–I418–21Generate and select solutions, apply Lean tools, pilot and compare against the baselineA tested solution with measured impact
ControlC1–C422–26Sustain the gains with control plans, control charts and standardizationA stable process and a documented result
Final Tollgate—27Submit your project documentation for review, and share it with your sponsorYour Lean Six Sigma Green Belt certificate
What you will be able to do

Skills you prove on your own process

Define

Scope a project with a clear problem statement, a SIPOC and a business case your sponsor signs off

Define

Turn the Voice of the Customer into measurable requirements

Measure

Collect reliable data, check your measurement system and calculate process capability

Analyze

Separate the vital few causes from the trivial many with Pareto, Fishbone and hypothesis tests

Analyze

Use correlation and regression to understand what really drives your process

Improve

Generate, evaluate and select solutions with structured tools such as the Pugh Matrix

Improve

Combine Six Sigma with Lean: the 7 Wastes, Theory of Constraints and value stream thinking

Control

Secure your results with control plans, control charts and Poka-Yoke

Business case

Put a price tag on poor quality and show your savings in euros, hours or capacity

For you and your organization

Your Return on Learning

A Green Belt should pay for itself. That is why we measure success on three levels.

Level 1

Output

What you complete

  • Around 80 hours of practice-based learning
  • 6 tollgates passed against clear criteria
  • Your Green Belt certificate by SKILLAGILITY
Level 2

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
Level 3

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.

Certificate and next steps

A certificate that proves you delivered

Project-based

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.

Standard

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.

Next level

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, Lean Six Sigma Master Black Belt
Your coach

Stefan Lachmann

Lean Six Sigma Master Black Belt · 20+ years in Operational Excellence

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
Compare your options

Classroom quality, without leaving your job

Classroom Green BeltSelf-paced e-learningSKILLAGILITY B303
Time away from workTypically 7 to 10 seminar daysNoneNone. Short units, your own pace
Own projectUsually after the seminar, on your ownRarely requiredBuilt in from day one
Personal coachingLimited during seminar daysNoneBookable 1:1 with a Master Black Belt
Help when you’re stuckUntil the seminar endsForum or emailCommunity and 6 live Study Halls with Collaborate
Certificate based onExam, sometimes plus project reportOnline examYour completed project
Typical price (net)€3,450 to €5,330Low€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.

Collaborate cohorts

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
EN
09:30–11:00Asia, India, UK and Europe
DE
11:30–13:00Lunch & Learn in German
EN
18:00–19:30Americas, UK and Europe
Can't make it? No worries. Every Study Hall runs three times on the same day and is recorded. All times are Berlin time. Collaborate starts with at least 4 participants. If a cohort does not fill up, you can move to the next one or switch to Core and get the price difference refunded.
  • 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
EN
09:30–11:00Asia, India, UK and Europe
DE
11:30–13:00Lunch & Learn in German
EN
18:00–19:30Americas, UK and Europe
Can't make it? No worries. Every Study Hall runs three times on the same day and is recorded. All times are Berlin time. Collaborate starts with at least 4 participants. If a cohort does not fill up, you can move to the next one or switch to Core and get the price difference refunded.
Pricing

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.

Core

At your own pace

€497
one-time, netStart with Coreor pay 2 × €248.50
RecommendedCollaborate

With 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✓✓
StartAny timeFebruary or September
AccessIncluding all updates12 months12 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
Corporate

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.

Request an offer
All prices net, plus VAT where applicableInterest-free installments: 2 up to €500, 3 above14-day right of withdrawalInvoice for your company
Is this for you?

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
Questions

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.

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