About This Certification

The Lean Six Sigma Yellow Belt (LSSYB) certification validates foundational knowledge of Lean Six Sigma methodology. Yellow Belts understand the DMAIC problem-solving framework, basic quality tools, waste identification, and how to support Green Belt and Black Belt improvement projects as team members.

Exam Overview

The LSSYB exam typically consists of 60–100 multiple-choice questions with a 2-hour time limit, depending on the certifying body. A minimum score of 70% is required. Available at testing centers and online from accredited providers.

Exam Domains & Weighting

Domain	Description	Weight
Overview of Six Sigma & the Organization	Six Sigma history, organizational goals, quality concepts, and the voice of the customer	20.0%
Define Phase	Project charter, SIPOC, stakeholders, process mapping, and defining problem/goal statements	20.0%
Measure Phase	Process mapping, data collection, basic statistics, measurement system analysis, and process capability	20.0%
Analyze Phase	Root cause analysis, fishbone diagram, 5 Whys, data analysis, and waste identification (8 wastes)	20.0%
Improve & Control Phases	Solution generation, piloting improvements, control charts, control plans, and sustaining gains	20.0%