LSSA Lean Six Sigma Yellow Belt Book

Updated on 16 October 2026. What’s new: exam fee corrected to €260, the price in LSSA's own web shop for the Lean Six Sigma Yellow Belt exam

LSSYB is the everyday shorthand for the Lean Six Sigma Academy Yellow Belt, the entry-level credential from LSSA, a certification body that has run Lean Six Sigma belts since 2009. The exam is 50 multiple-choice questions in 60 minutes, open book, with a passing score of 32 / 50. This guide covers what the paper asks, what LSSA's own sample reveals, the cost, a ten-day plan and what a Yellow Belt does afterwards.

People reach this topic by typing many spellings: LSSYB, LSS YB, LSS-YB, LSSA-YB or the longer Lean Six Sigma Yellow Belt. They all point to the same LSSA exam, with exam code LSSA-YB. One warning for anyone who typed "CLSSYB": that is usually a slip for ASQ's CSSYB, a different Yellow Belt from a different body with a different exam. If your employer asked for the LSSA version, you are in the right place.

The belt is aimed at people who do the work rather than people who lead the improvement. LSSA's own page describes a Yellow Belt as someone with day-to-day experience of processes, which makes them a natural team member on Kaizen, Green Belt and Black Belt projects, and as someone responsible for improving operational performance in a department or on a production line.

A calendar invite lands in an HR manager's inbox: "Black Belt kickoff, Tuesday, HR representative required." She has never built a control chart and is not sure why the meeting involves her. The answer is that HR has two jobs in Six Sigma. It supplies the people side of the programme, from choosing belts to explaining the change to staff, and it owns processes of its own, such as hiring, onboarding and payroll, that can be measured and improved in the same way as a production line.

Only one line of method is needed before starting. Six Sigma works through five steps, abbreviated DMAIC: define the problem, measure it, analyse the cause, improve the process, then control the gain. The rest of this article is about how that plays out in an HR department.

Is Six Sigma useful for HR, or is it a factory method?

It began on manufacturing lines, at Motorola in the 1980s, and its vocabulary still sounds like a factory: defects, yield, throughput. But the logic does not care what is being made. Wherever work repeats and the outcome can be counted, the same questions apply. HR runs exactly that kind of work in volume: payslips every month, offers every week, contracts, leave requests, benefit queries, mandatory-training reminders.

Three tests decide whether a given HR process is worth a Six Sigma project.