Certified Six Sigma Black Belt credential artwork

Certified Six Sigma Black Belt (CSSBB) Exam Guide

Validates knowledge of leading Six Sigma projects, including the DMAIC method, advanced statistics, team management and organizational deployment.

The exam checks that you can lead a DMAIC project and the people on it: choose and deploy projects, manage a team, then measure, analyze, improve and control with advanced statistics. It is open book, so learn the concepts first, then build a tabbed reference you can search quickly across a 4-hour sitting.

Understand the exam

Syllabus

IOrganization-wide planning and deployment12 questions
  1. AOrganization-wide considerations
  2. BLeadership
IIOrganizational process management and measures12 questions
  1. AImpact on stakeholders
  2. BBenchmarking
  3. CBusiness measures
IIITeam management15 questions
  1. ATeam formation
  2. BTeam facilitation
  3. CTeam dynamics
  4. DTeam training

Example scenario: A cross-functional team has one dominant engineer and two members who rarely speak. Which facilitation technique would you use in the next meeting, and what would you set up before it?

IVDefine20 questions
  1. AVoice of the customer
  2. BBusiness case
  3. CProject management (PM) tools
  4. DAnalytical tools

Example scenario: Sponsors want to “reduce rework in the plant.” What would a usable problem statement, scope and SMART goal look like, and who must agree to the charter?

VMeasure25 questions
  1. AProcess characteristics
  2. BData collection
  3. CMeasurement systems
  4. DBasic statistics
  5. EProbability
  6. FProcess capability

Example scenario: A gauge R&R study shows 35% of tolerance consumed by measurement error. What would you do before collecting baseline capability data, and why?

VIAnalyze22 questions
  1. AMeasuring and modeling
  2. BHypothesis testing
  3. CRisk analysis and management
  4. DAdditional analysis methods

Example scenario: You have 40 results from each of three suppliers. Which test compares their means, which assumptions would you check first, and what does a significant result tell you?

VIIImprove21 questions
  1. ADesign of experiments (DOE)
  2. BLean methods
  3. CImplementation

Example scenario: You can test three factors at two levels but only have budget for 4 runs. Which experimental design fits, and what do you give up?

VIIIControl17 questions
  1. AStatistical process control (SPC)
  2. BOther controls
  3. CMaintain controls
  4. DSustain improvements

Example scenario: A control chart shows seven points in a row above the centre line. What does that signal, and what would you check before adjusting the process?

IXDesign for Six Sigma (DFSS) framework and methodologies6 questions
  1. ACommon DFSS methodologies
  2. BDesign for X (DFX)
  3. CRobust designs

Official CSSBB Body of Knowledge · 2022 BoK

Format

Questions
165
Duration
4h 18m
Passing score
550 / 750
Delivery
Test centre or online
Languages
English

Question types

Multiple choice. Choose the single best answer from four options.

CertUp example

A Black Belt wants to compare average cycle time across four suppliers, with 30 orders from each. Which test fits?

  1. Paired t-test
  2. One-way ANOVA
  3. Chi-square test of independence
  4. Two-sample test for proportions
Show answer

B. One-way ANOVA. It compares means across more than two independent groups; a t-test handles only two.

Eligibility and booking

Projects and experience required to sit the exam

Completed Six Sigma projects with signed affidavits

Required

Your project champion signs an affidavit for each project. Projects need hands-on work and measured before-and-after financial benefit; classroom or mock projects do not qualify.

Two projectsTwo completed projects with two signed affidavits. No years requirement.
One project plus experienceOne completed project with a signed affidavit and 3 years of full-time paid work in the Black Belt Body of Knowledge.

Send signed affidavits to cert@asq.org within one week of applying, or ASQ cancels your application and refunds the fee minus the $130 application fee. Projects older than two years are accepted if they used Six Sigma tools. You do not need CSSGB first, and ASQ grants no education waivers.

Apply on asq.org for a testing window, pay the fee and send your signed affidavits within one week. After approval, ASQ emails a Prometric eligibility ID so you can book a test centre or remote appointment. CSSBB runs in odd-numbered months, and your eligibility covers three consecutive windows from the one you choose. The next window open for new applications is January 2027; apply by December 7, 2026.

Apply and see testing windowsProject affidavit formComputer-based testing

Make a study plan

Read the Body of Knowledge and try a short practice set first. Spend most of your time on the sections where you score lowest, which is often the statistics.

Most candidates spend 60–120 hours. Plan for the low end if you have led projects and use statistics regularly; add time if DOE, regression or non-normal capability are new.

13 weeksto be ready
  1. 1Understand the examRead the syllabus and format, check you’re eligible and pick a target date.5 h
  2. 3Learn the core conceptsWork through one main course or book, topic by topic.60 h
  3. 4Practice with mock examsTake timed practice tests and review every mistake.30 h
  4. 5Prepare for exam dayBook the exam and check the ID and delivery rules.5 h

Learn the core concepts

The ASQ handbook is written to the Body of Knowledge and doubles as your open-book reference. Add a video course if you prefer guided lessons.

Best official courseCSSBB Certification PreparationASQ · $924 · $824 for ASQ members · 365 daysBest video courseCertified Lean Six Sigma Black Belt Training (Accredited)Quality Gurus · $140 · lifetime accessBest official referenceASQ CSSBB Handbook, 4th editionASQ Quality Press · $150 · $105 for ASQ members · hardcover
See all 3 CSSBB courses →

Use the index. One passer leaned on the handbook’s back index during the exam. Bring only bound material, with sticky tabs attached before you arrive.

Practice with mock exams

Practice shows where you lose points. The exam has many best-answer questions, so time yourself and review why each wrong option is wrong.

Official question bankASQ CSSBB Question BankASQ · $119 ($109 ASQ member) · 365 daysCSSBB Free Practice TestsQuality Gurus · Free · no signupASQ Certified Six Sigma Black Belt Study Guide, 2nd EditionASQ Quality Press · $60 ($42 ASQ member) · softcover
See all 6 CSSBB practice tests →

Are you ready?

  • You can walk through each DMAIC phase and the tools used in it.
  • You can choose the right hypothesis test, experimental design and control chart for a scenario.
  • You can find any Body of Knowledge topic in your reference within a minute.
  • You finish a timed 150-question set with time to review flagged questions.

Prepare for exam day

Bring accepted ID and bound references, and follow the checklist for your delivery route.

Before travelling to Prometric

  • Arrive 30 minutes early. Late arrivals cannot test and lose the fee.
  • Bring valid government-issued photo ID; the name must match your scheduling notification exactly.
  • Bring bound references only; staff inspect them before you enter.
  • Bring a silent, non-programmable calculator or use the on-screen one.
  • Belongings go in a locker; scratch paper and pencils are provided.
  • Change an appointment at least five days ahead on Prometric’s site; the fee is $130.
  • There are no scheduled breaks at a test centre, and the clock keeps running if you leave the room.
ASQ exam policies

Remote proctoring is not available in China, Saudi Arabia, the United Arab Emirates, Qatar or Pakistan.

ASQ computer-based testing

Advice from exam takers

Study the Black Belt Body of Knowledge, not general project management.

A candidate who prepared with the PMBOK and failed the exam was told by replies to use the ASQ handbook and study guide listed on the exam page.

r/SixSigmaReddit: ASQ Black Belt test, May 2025