CSSBB study guide · 2026
9 domains and 33 official subsections. Measure carries the most weight at 16.7%. Each guide explains what the domain covers, how its questions are framed and where candidates lose marks.
Bar widths follow the official weights. Weight ranges are drawn at their midpoint.
33 official subsections 170–240 hrs suggested study
Why an organization runs six sigma at all, how projects are tied to strategy, and who does what from executive to Green Belt. It sets the governance lens the rest of the CSSBB exam assumes.
Inside this domain
Watch for Black Belt as the fixer of politics
How a Black Belt judges a process change by its effect on stakeholders, by external comparison, and by money. Expect short calculations on NPV, ROI and cost of quality alongside scorecard and benchmarking scenarios.
Inside this domain
Watch for Bigger total wins
How a Black Belt builds, runs and trains improvement teams. These are people-judgment questions, and with 18 scored items they outweigh several of the technical sections.
Inside this domain
Watch for Public confrontation
Turning customer needs into a scoped, chartered project with a schedule and the right planning tools. Mistakes made in Define propagate through every later phase, so the exam probes it in detail.
Inside this domain
Watch for Specific but presumptive problem statement
The largest section of the CSSBB: process metrics, data collection, measurement system analysis, statistics, probability and capability. It is calculation-heavy, and every later phase depends on getting its numbers right.
Inside this domain
Watch for Capability before control
Proving which inputs drive the output: regression, multivariate tools, the full set of hypothesis tests, FMEA and root cause analysis. Choosing the right test is half the work, and the exam tests that choice often.
Inside this domain
Watch for Independent instead of paired
Confirming causes with designed experiments, removing waste with lean methods, and implementing the solution safely. DOE calculations and resolution questions are the technical core; lean and pilot decisions round it out.
Inside this domain
Watch for Unaveraged effect
Holding the gain: statistical process control, other controls such as TPM and visual management, control plans, and the handoff that keeps improvements alive after the project closes.
Inside this domain
Watch for Defects on a p chart
Building quality into new products and processes with DFSS roadmaps, design for X and robust design. It is the smallest section, but its formulas are compact and quick to learn.
Inside this domain
Watch for DMAIC for everything
Marks follow weight. This order puts the most marks behind you first, across about 170–240 hrs of study.
The answer that looks right, and the clue that gives it away.
Clue The obstacle is about people, budget or another manager's priorities rather than analysis.
Clue Projects have different benefit timing and a discount rate or cost of capital is given.
Clue The question asks for the FIRST or BEST facilitator action.
Clue The statement contains words such as caused by, due to, or must implement.
Clue The scenario mentions points beyond control limits or shifts in the baseline.
Clue The same units, people or parts are measured under both conditions.
Clue A coded design table with responses for every run.
Clue The data count flaws per unit rather than units that fail.
Study guides for exams that overlap with CSSBB.
CSSBB has 9 domains with 33 official subsections between them: Organization-wide Planning and Deployment, Organizational Process Management and Measures, Team Management, Define, Measure, Analyze, Improve, Control and Design for Six Sigma (DFSS) Framework and Methodologies.
Measure is the heaviest at 16.7%, followed by Analyze (14.7%). The lightest is Design for Six Sigma (DFSS) Framework and Methodologies (4.7%). Weights come from ASQ's official outline.
Questions: 165 on computer-based exam (150 scored, 15 unscored); 150 on paper-based exam. Time allowed: 4 hours 18 minutes of exam time in a 4.5-hour appointment (computer-based); 4 hours (paper-based); open book. Passing score: 550 out of 750.
Our planning estimate is 170–240 hrs across all domains, split by weight. It is an editorial estimate, not an official figure, so adjust it to your experience and to how you score on practice questions.
Start with Measure, because it carries the most marks, then work down by weight. Use the checklist on each domain page to confirm you can do what the domain asks before moving on.
This guide follows ASQ CSSBB Body of Knowledge (2015 BoK, current as of October 2026), published by ASQ. It was last reviewed in October 2026.
Domain names, weights and subsections come from ASQ's official outline (ASQ CSSBB Body of Knowledge (2015 BoK, current as of October 2026)). Question counts and study hours are editorial planning estimates, not official figures. Last reviewed October 2026.