Certifications
The three levels of Lean Six Sigma
Yellow, Green and Black Belt are not three versions of the same exam: they are three different roles in an improvement initiative. The first takes part, the second leads a project within their scope, the third carries projects that cross the organisation.
Each page below describes what the level covers, what it assumes is mastered, and what to practise.
Lean Six Sigma Yellow Belt certification
level 1For someone who takes part in improvement projects without leading them: operator, technician, clerk, first-line supervisor, or anyone whose company is starting a Lean initiative.
997 practice questions
Lean Six Sigma Green Belt certification
level 2For an engineer, technician, quality manager, team leader or manager who will lead improvement projects part-time, alongside their job.
2,070 practice questions
Lean Six Sigma Black Belt certification
level 3For an experienced professional who will lead cross-functional projects full-time or most of the time, coach Green Belts and report to senior management.
2,480 practice questions
Who awards these certifications?
There is no single official body: several private institutions each award their own, with exams that differ in duration, pass mark and language.
Compare IASSC, CSSC, ILSSI and ASQbeltup is an independent practice tool: it awards no certification and is not affiliated with any certification body. Trademarks and non-affiliation