Quick answer: Lean Six Sigma is a data-driven approach to process improvement that combines Lean’s focus on eliminating waste with Six Sigma’s focus on reducing defects and variation. Together they give teams one toolkit — built around the five-phase DMAIC framework (Define, Measure, Analyse, Improve, Control) — for making processes both faster and more consistent. It’s taught through belt-based certifications, from Yellow through Black Belt, and is used across manufacturing, healthcare, finance and government to cut costs and improve quality.
If you searched “lean six sigma” because you keep hearing the term at work and aren’t sure what it actually involves, or whether it’s worth the time to get certified — this is the plain-English version.
The problem most people searching this term actually have
Usually it’s one of three things: you’ve been told to “look into Lean Six Sigma” for a project and don’t know where to start; you’re weighing up whether a certification is worth the investment for your career; or you’re trying to figure out which belt level is right for you. All three are solvable in about five minutes of reading, so let’s go through them.
What Lean Six Sigma actually does
Lean, on its own, is about removing steps in a process that don’t add value — the extra approvals, the waiting, the rework. Six Sigma, on its own, is a statistical method for reducing variation and defects so outcomes become predictable. Put them together and you get a structured way to make a process both leaner and more reliable, which is why most organisations now teach them as one discipline rather than two. (Curious how the two individually compare? Read Lean vs Six Sigma: What’s the Difference?)
In practice, that means lower operating costs from reduced waste and rework, fewer defects, faster turnaround times, and a measurable, repeatable way to prove improvement to stakeholders — rather than relying on gut feel.
Why it’s worth trusting a structured course over YouTube videos
We’ve been training Lean Six Sigma professionals since 2016, across Australia and the wider APAC region, and organisations like William Buck, Visy Board, Power Water Corporation and Metro Mining Ltd have put their teams through our programs. Courses are self-paced and online, with personalised trainer support rather than a pre-recorded video and a quiz — and 90% of students who start a course actually finish it, which is well above the industry norm for self-paced online learning.
Here’s what recent graduates say about it:
“The course content was highly practical and immediately relevant, while the support provided throughout was prompt and effective.” — Rochelle J, Green Belt Graduate
“I found the course content to be well-structured, practical, and easy to follow. The support provided throughout the course was prompt.” — Lydia Y, Green Belt Graduate
Which certification should you start with?
If you’re new to Lean Six Sigma entirely, our Lean Six Sigma Green Belt course is the most common starting point for professionals who want to lead improvement projects, not just support them. It’s self-paced (6-month window, 30–40 study hours), built around real case studies, and taught by practitioner-instructors rather than career trainers.
FAQ
Is Lean Six Sigma one methodology or two combined?
It’s two proven methodologies — Lean and Six Sigma — combined into a single toolkit. You’ll sometimes see them taught separately, but most modern certifications, including ours, teach them together because they solve complementary problems.
Do I need a technical or statistics background to learn it?
No. Courses are built for quality team members, business managers, and entrepreneurs alike, with no advanced maths background required to get started.
How long does certification take?
Self-paced courses typically run within a 6-month completion window, with 30–40 hours of study time for Green Belt.