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ICBB Exam Questions & Answers

IASSC Certified Lean Six Sigma Black Belt  •  IASSC

300 Questions Updated Sep 2026 99% Pass Rate
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Sample ICBB Questions

Practice with real exam-style questions, each with the verified correct answer and explanation.

Q1 MultipleChoice

It would be more likely than not for a Belt conducting a Regression Analysis to find that the _______________________.

Correct Answer: A
Q2 MultipleChoice

One of the primary deliverables from performing a SIPOC is to begin to understand which inputs have the greatest affect on the ______________ outputs.

Correct Answer: D
Q3 MultipleChoice

The _____________ Distribution would be the most desirable for modeling the number of stitch defects in a portion of fabric.

Correct Answer: C
Q4 MultipleChoice

Special Cause Variation falls into which two categories? (Note: There are 2 correct answers).

Correct Answer: C, D
Q5 MultipleChoice

A ___________ problem in the Measurement System suggests that there is a lack of consistency in the measurement over time.

Correct Answer: C

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Frequently Asked Questions

The ICBB is a professional certification offered by the International Association for Six Sigma Certification (IASSC) that validates expertise in Lean Six Sigma methodologies at the Black Belt level. This certification demonstrates proficiency in leading complex improvement projects, statistical analysis, and process optimization across various industries.

IASSC does not have strict formal prerequisites for the ICBB exam, though they recommend candidates have practical experience with Lean Six Sigma projects and foundational knowledge of the methodology. Many candidates pursue this certification after completing their Green Belt or through hands-on project experience in their organizations.

The ICBB exam typically contains 150 multiple-choice questions that must be completed within a 4-hour timeframe. A passing score is generally 70% or higher, though the exact requirement may vary by testing provider and exam version.

The ICBB exam covers advanced topics including Define phase, Measure phase, Analyze phase, Improve phase, Control phase, and design elements specific to Lean Six Sigma projects. It also includes statistical methods, hypothesis testing, regression analysis, design of experiments, and process capability analysis at an advanced level.

The ICBB exam cost typically ranges from $395 to $895 USD depending on the testing provider and whether study materials are included. Some organizations offer bundle packages that include training courses and exam fees at different price points.
Exam Details
  • Exam CodeICBB
  • VendorIASSC
  • Total Questions300
  • LanguageEnglish
  • Case Studies240
  • Last UpdatedSep 3, 2026
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