Lean Six Sigma Green Belt Online Course
Green Belt is where Lean Six Sigma stops being theory and starts being something you lead. You'll run a full DMAIC project from Define through to Control, use statistical tools with confidence, and leave with a portfolio-ready piece of work. Built by a Master Black Belt. Taught in plain English. No classroom required.
Green Belt
Recognised by the Council for Six Sigma Certification
SimplicityHub Lean Six Sigma courses are recognised by the Council for Six Sigma Certification as an accredited provider. You can view the accrediting body at sixsigmacouncil.org .
Built for project leaders
Green Belt is for people who will actually lead improvement projects. You'll leave able to write a project charter, collect and analyse data, test hypotheses, and present capability results to executives.
Most learners complete in 4-6 weeks at 5-6 hours per week. The course includes a guided mini-project so you apply every tool to a real scenario.
If you already have Yellow Belt, Green Belt is the natural next step. If not, the Suite bundle (£315 for Yellow + Green + Black) is the best-value path.
What you'll learn
Full DMAIC
Run Define, Measure, Analyse, Improve and Control from start to finish with templates and toll-gate reviews.
Descriptive statistics
Mean, median, standard deviation, histograms, box plots — when each matters and how to read them.
Hypothesis testing
t-tests, ANOVA, chi-square, p-values. Taught with real datasets and a live p-value calculator.
Process capability
Cp, Cpk, Pp, Ppk — how to calculate and what the numbers actually mean for customers.
Regression & correlation
Simple linear regression, correlation coefficients and interpreting R² without getting lost in theory.
Guided mini-project
Apply the full toolkit to a real case study. AI coach gives stage-by-stage feedback.
See what you’re getting
Real lessons, real content — here’s a glimpse of what you’ll find inside the Green Belt course.
Example Green Belt improvement projects
Green Belt projects usually focus on measurable process improvement. They use DMAIC, data collection, root cause analysis and practical controls to reduce variation, remove waste and improve performance.
Reduce process defects
Use data collection, Pareto analysis and root cause tools to reduce recurring errors, rework or customer complaints in a process.
Improve turnaround time
Map the current process, identify delays and use Lean tools to reduce handoffs, waiting time and avoidable process steps.
Increase process consistency
Measure variation, standardise work and introduce controls so performance is more predictable across shifts, teams or locations.
Green Belt projects are designed to produce visible, measurable improvement without needing to redesign an entire organisation. They are ideal for supervisors, analysts, engineers, team leaders and improvement practitioners who need to turn process problems into evidence-based action.
Get all three belts for £315 — save £275
Yellow, Green and Black Belt in one payment. Most learners who start go all the way — buying the Suite means you commit once and save £275 overall.
Where does Green Belt fit in your journey?
Rated 4.9/5 by early learners
Nothing needs to change, it's perfect. Maybe include other languages.
Clear and well structured introduction to Lean Six Sigma!
It is an excellent course! It would be great to add some assignments to make it more fruitful.
Everything you need to deliver real improvement projects
Common questions
Do I need Yellow Belt first?
No. Green Belt includes Yellow Belt fundamentals in module 1. If you already have Yellow Belt, skim or skip.
How long does it take?
4-6 weeks at ~5-6 hours per week, fully self-paced.
Is there any statistics prerequisite?
No formal stats background needed. We teach the underlying ideas in plain English with worked examples before any formulas.
Is the certificate recognised?
Aligned with industry standards and mapped to the Lean Six Sigma Green Belt framework. Issued by SimplicityHub Academy on completion.
Suite bundle or just Green?
If you plan to do Black Belt within 12 months, the Suite bundle (£315) saves you £275 versus buying each belt separately.
How the belts compare
| Yellow | Green | Black | Suite | |
|---|---|---|---|---|
| Price | £110 | £185 | £295 | £315 (all three) |
| Depth | Awareness | Practitioner | Expert / leader | Full stack |
| Duration | 2-3 weeks | 4-6 weeks | 8-12 weeks | 14-20 weeks |
| Mini-project | — | Guided | Full, AI-graded | All three |
| Best for | Team members | Project leads | CI leaders | Career change |