What Is the IASSC Yellow Belt Credential?Your Entry into Process Improvement
The Lean Six Sigma Yellow Belt (LSSYB) is an entry-level process improvement certification that validates your understanding of the DMAIC method across all five phases: Define, Measure, Analyse, Improve and Control. Awarded by the International Association for Six Sigma Certification (IASSC), now part of PeopleCert, it is an independent, third-party validation of foundational Lean Six Sigma knowledge recognised by employers worldwide. This Liverpool training prepares front-line staff, team members and professionals new to quality improvement to support DMAIC projects led by Green and Black Belts. You learn core Lean tools such as 5S, value stream mapping and Poka-Yoke, plus quality metrics including DPMO, FTY and Cost of Poor Quality. With Merseyside employers in advanced manufacturing, logistics and life sciences investing in operational excellence, a Yellow Belt is a practical way to prove process improvement literacy and build toward Green Belt. Start your Lean Six Sigma journey with Invensis Learning.
Invensis Learning is an accredited IASSC (Peoplecert) training partner in Liverpool (2778), approved to deliver official LSSYB training using IASSC-aligned courseware.









