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Lean Six Sigma Qualifications

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The world’s most practical Lean Six Sigma certification pathway

Lean Six Sigma is one of the most widely used approaches for improving processes, reducing waste, and delivering measurable business value.

At Thought Agile, our Lean Six Sigma qualifications are designed to help professionals move beyond tools and terminology, and instead develop the capability to analyse problems, improve processes, and sustain performance improvements in real organisational settings.

We offer Lean Six Sigma training across three progressive belt levels:

We offer Lean Six Sigma training across three progressive belt levels:
Lean Six Sigma Yellow Belt
  • Lean + Six Sigma basics: waste, variation, defects.
  • DMAIC steps: Define, Measure, Analyze, Improve, Control.
  • Key terms/tools: VOC, CTQ, SIPOC, process map, Pareto, fishbone.
  • Yellow Belt role: support team, collect data, help implement.
  • Sustain: standard work, visual controls, simple monitoring.
Lean Six Sigma Green Belt
  • LSS fundamentals: reduce waste + reduce variation/defects.
  • Lead DMAIC projects end-to-end (charter to control plan).
  • Use data/stat tools: capability, control charts, basic hypothesis tests, FMEA.
  • Improve & sustain: pilots, standard work, visual controls, monitoring.
  • People side: facilitate teams, coach Yellow Belts, report benefits at tollgates.
Lean Six Sigma Black Belt
  • Lead cross-functional LSS programmes tied to business priorities.​
  • Master DMAIC: reliable data, proven causes, scalable fixes, strong control plans.​
  • Apply advanced stats: regression, ANOVA, DOE, SPC, capability.​
  • Drive Lean change: VSM, flow/pull, poka‑yoke, standard work, visual management.
  • Develop people: mentor belts, run tollgates, validate financial benefits.

Why Lean Six Sigma Matters Today

Organisations today are under constant pressure to:

Lean Six Sigma provides a structured, evidence-based approach to achieving these goals.

Rather than relying on intuition or isolated fixes, Lean Six Sigma enables teams to:

This makes Lean Six Sigma relevant across manufacturing, services, healthcare, finance, public sector, and technology environments.

How Lean Six Sigma Delivers Organisational Value

Lean Six Sigma combines two powerful perspectives:

Together, they provide a balanced approach that improves speed, quality, and reliability.

Through Lean Six Sigma capability, organisations benefit from:

For individuals, Lean Six Sigma builds analytical thinking, structured problem solving, and professional credibility.

The Lean Six Sigma Belt Pathway

Our Lean Six Sigma qualifications are structured around a clear progression of capability.

Lean Six Sigma Yellow Belt

Focuses on awareness and contribution.

Participants learn the fundamentals of Lean Six Sigma and how to support improvement initiatives as informed team members.

Lean Six Sigma Green Belt

Focuses on practical application and delivery.

Participants develop the skills to lead improvement projects within their area of responsibility, using Lean Six Sigma tools and techniques.

Lean Six Sigma Black Belt

Focuses on leadership, complexity, and organisational impact.

Participants learn to lead complex, cross-functional improvement programmes and coach others in Lean Six Sigma thinking.

Choosing the Right Belt Level

If you are unsure, our team is happy to help you choose the most appropriate route based on your experience and goals.

Choose Yellow Belt if you are new to Lean Six Sigma or want foundational understanding.
Choose Green Belt if you are expected to deliver measurable improvements.
Choose Black Belt if you lead strategic improvement initiatives or mentor others.

If you are unsure, we will help you identify the most appropriate level based on your context and objectives.

What’s Included in Every Course

Expert-led training by certified Prince practitioners
Official Prince Handbook (v7)
Pre-course study pack to help you prepare
Exam vouchers (Foundation and/or Practitioner)
Practice questions and mock exams
Certificate of attendance
Course workbook, templates, and job-aids
Need to know more?

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How We Teach Lean Six Sigma at Thought Agile

Lean Six Sigma is practical by nature. Our teaching reflects that.

Across all belt levels, our approach includes:

Our focus is on developing capability that lasts beyond the classroom.

Who These Courses Are For

Lean Six Sigma qualifications are suitable for:

Courses can be delivered to individual learners or tailored for in-house teams.sca

Accreditation and Certification

All Lean Six Sigma courses at Thought Agile are delivered with formal accreditation, ensuring credibility and recognition.

We are accredited to offer Lean Six Sigma certification through:

  • APMG International
  • PeopleCert

The learning outcomes and belt-level capability are equivalent, regardless of awarding body. The difference lies in exam administration and certification branding.

We will guide you on the most appropriate option based on:

  • Organisational preference
  • Sector requirements
  • Existing certification frameworks

Take the Next Step

Whether you are starting your Lean Six Sigma journey or advancing to a higher belt level, we will help you build practical, credible improvement capability.

Explore Lean Six Sigma Yellow Belt
Explore Lean Six Sigma Green Belt
Explore Lean Six Sigma Black Belt