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IASSC ICGB Exam Questions

Exam Name: IASSC Certified Lean Six Sigma Green Belt Exam
Exam Code: ICGB
Related Certification(s): IASSC Lean Six Sigma Green Belt Certification
Certification Provider: IASSC
Actual Exam Duration: 240 Minutes
Number of ICGB practice questions in our database: 200 (updated: Oct. 24, 2026)
Expected ICGB Exam Topics, as suggested by IASSC :
  • Topic 1: Six Sigma Roles & Responsibilities/ Gage Repeatability & Reproducibility
  • Topic 2: Statistical Process Control (SPC)/ Critical to Quality Characteristics (CTQ’s)
  • Topic 3: Confidence & Prediction Intervals/ Elements of the Response Plan/ Deliverables of a Lean Six Sigma Project
  • Topic 4: Normal Distributions & Normality/ Overproduction, Correction, Inventory, Motion, Overprocessing, Conveyance, Waiting
  • Topic 5: General History of Six Sigma & Continuous Improvement/ Financial Evaluation & Benefits Capture
  • Topic 6: Attribute & Discrete Capability/ Understanding Inference/ Multiple Regression Analysis
  • Topic 7: Hypothesis Testing with Non-Normal Data/ Voice of the Customer, Business and Employee
  • Topic 8: General Concepts & Goals of Hypothesis Testing/ One and Two Sample Proportion
  • Topic 9: Control Chart Anatomy/ Data Collection for SPC/ Building a Business Case & Project Charter
  • Topic 10: Process Mapping, SIPOC, Value Stream Map/ Failure Modes & Effects Analysis (FMEA)
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Dorothy Evans

29 days ago
I just passed the IASSC Lean Six Sigma Green Belt, and my biggest win was doing timed sets to build stamina and avoid getting stuck on calculations. I also reviewed definitions daily since the exam expects precise terminology across all five phases.
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Justin White

2 months ago
Control Phase items test control plan design, SPC interpretation, and capability calculations, and they often ask you to distinguish stability from capability or compute Cp versus Cpk under shifting means. Someone I studied with passed by memorizing run rules, practicing control chart patterns, and running capability examples until the control questions became routine.
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Justin Harris

2 months ago
I passed the IASSC Certified Lean Six Sigma Green Belt exam and found the Control phase sneaky because it mixes control plans, SPC, and sustaining changes in realistic situations. Reviewing what each control chart is for and when to update procedures helped me answer with confidence.
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Dennis Nguyen

3 months ago
Improve Phase can include DOE output, interaction interpretation, or FMEA prioritization problems, and the trickiest questions often hinge on reading ANOVA tables or recognizing interaction effects. A classmate passed the exam after working many DOE setups and pilot test scenarios, which made selecting robust improvements much easier.
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Elizabeth Perez

3 months ago
After passing the IASSC Green Belt, I can say the Improve phase questions were easier when I tied them back to root cause and validated gains rather than jumping to solutions. I used short scenario drills to practice selecting the best next step in DMAIC.
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Amanda Lee

4 months ago
Analyze Phase questions frequently require choosing the correct hypothesis test or interpreting ANOVA output, and I found p-value interpretation and test assumptions to be deceptively tricky. A teammate passed by spending time on when to use parametric versus nonparametric tests and practicing data diagnostics so the statistical inference questions felt intuitive.
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Harold Green

4 months ago
I managed to pass the IASSC Certified Lean Six Sigma Green Belt on my first try, and the Analyze phase was the most time consuming because the distractors were close. Practicing basic hypothesis testing decisions and interpreting simple charts made the difference.
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Sharon Thomas

5 months ago
Measure Phase often throws Gage R&R tables, control chart selection, or sampling problems at you, with questions that expect you to pick the right chart for attribute versus continuous data. Someone I know managed to pass and thanks Pass4Success for providing good collection of exam questions for preparation in short time, saying focused practice on MSA and chart rules made the Measure items straightforward.
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Margaret Edwards

5 months ago
I passed the IASSC Lean Six Sigma Green Belt exam by drilling the Define and Measure phase tools until I could pick the right one quickly, since many questions hinge on subtle wording. A one page DMAIC cheat sheet for inputs and outputs kept me from overthinking.
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Thomas Nelson

6 months ago
Define Phase questions often present a messy business scenario and ask you to extract the true CTQ or complete a SIPOC, scenario-based items that require translating VOC into measurable requirements were the hardest for me. A colleague passed the ICGB by drilling problem statements, stakeholder mapping, and SIPOC exercises, which clarified those tricky items.
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James Torres

6 months ago
When I took the ICGB I found the Analyze Phase hypothesis testing questions with pooled versus unpooled variance really tricky, the scenario wording made it unclear which test to use and time pressure didn't help. Sketching the sample sizes and variances and checking assumptions before choosing the test saved me several minutes.
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Rachel Taylor

6 months ago
Honestly, the Measure Phase MSA questions tripped me up more because I hesitated on when to recommend a full Gage R&R versus a basic repeatability check.
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Paul Green

6 months ago
Interestingly, I found control chart questions with subgroup size one confusing at first since the standard rules felt less intuitive without larger subgroups.
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Linda Peterson

6 months ago
Sometimes the Improve Phase DOE items expect you to reason about main effects and interactions qualitatively, so a quick factor table can be a lifesaver.
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Karen Flores

6 months ago
Remember that many Control Phase prompts want a practical monitoring plan and reaction steps rather than theoretical detail about control limits.
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Jeffrey Jones

6 months ago
Another tricky topic was process capability calculations like Cp versus Cpk when the mean shifts, because answer choices often look subtly different.
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Hyman

7 months ago
I passed the IASSC Certified Lean Six Sigma Green Belt exam, and the Pass4Success practice questions were essential. One challenging question was about calculating process variation using standard deviation in the Measure Phase. I wasn't entirely sure about the steps, but I still passed.
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Zona

7 months ago
Nerves hit hard before the exam, yet Pass4Success gave me a solid framework and practice that boosted my momentum. To future test-takers: keep moving forward.
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Stefania

7 months ago
I was anxious about tricky questions, but Pass4Success demystified the material with practical examples and reviews. Trust the process—your success is possible.
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Tawanna

8 months ago
Pass4Success practice exams were a game-changer for me. Tip: Practice active listening during the exam.
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Veronica

8 months ago
Just cleared the IASSC Green Belt exam, and the Pass4Success practice questions were crucial. There was a question in the Define Phase about creating a project charter. I had some doubts about the key elements to include, but I managed to get through it.
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Devon

8 months ago
Passed the IASSC IASSC Certified Lean Six Sigma Green Belt exam with pass4success practice exams. Tip: Prioritize topics based on exam weightage.
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Rima

8 months ago
I passed the IASSC Certified Lean Six Sigma Green Belt exam, and the Pass4Success practice questions were a great help. One tricky question was about selecting appropriate control charts in the Control Phase. I wasn't sure when to use an I-MR chart, but I still passed.
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Ronna

9 months ago
IASSC Green Belt exam conquered! Pass4Success, your practice tests were a perfect match. Thank you!
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Mary

9 months ago
Process capability indices (Cp, Cpk) felt like a trap; I second-guessed every step. Pass4Success practice offered clear explanations that clarified calculation steps.
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Janessa

9 months ago
I successfully passed the IASSC Green Belt exam, thanks to the Pass4Success practice questions. There was a question in the Improve Phase about using the 5S methodology to organize a workspace. I had some doubts about the sustain step, but I managed to pass.
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Julio

9 months ago
Green Belt achievement unlocked! Pass4Success, you're the real MVP. Your prep materials were invaluable.
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Goldie

10 months ago
Hypothesis testing under time pressure for small samples was rough. Pass4Success timed quizzes trained my pace and helped me spot which tests to apply.
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Rosendo

10 months ago
Phew! IASSC Green Belt certified. Pass4Success prep was key - their questions were so similar to the real thing!
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Dyan

10 months ago
The SIPOC and VOC linkage question style was tricky; I kept missing how inputs drive outputs. pass4success drills reinforced the flow, and I finally saw the logic.
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Arthur

10 months ago
The DMAIC data interpretation was brutal—confusing control charts and CTQ mapping. pass4success practice exams helped me practice the chart questions until the patterns clicked.
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Jannette

11 months ago
Happy to share that I passed the IASSC Certified Lean Six Sigma Green Belt exam, and the Pass4Success practice questions were invaluable. One challenging question was about using regression analysis in the Analyze Phase. I wasn't sure how to interpret the coefficients, but I got through it.
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Christa

11 months ago
Wow, the IASSC Green Belt exam was tough, but I made it! Pass4Success materials were a lifesaver. Highly recommend!
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Nelida

11 months ago
The morning of the test, butterflies were real, but Pass4Success's targeted practice and confidence-building tips turned worry into readiness. Stay focused and finish strong.
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Man

11 months ago
I doubted my pace and accuracy, but Pass4Success helped me pace effectively with timed drills and concise modules. You've got this—consistency wins the race.
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Ressie

12 months ago
Nervous thoughts clouded my mind at first, yet pass4success provided clear study plans and simulations that built my confidence. Believe in your prep and keep pushing forward.
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Joana

12 months ago
I passed the IASSC Green Belt exam, and the Pass4Success practice questions were incredibly useful. There was a tricky question in the Measure Phase about calculating the sigma level of a process. I had some doubts about the formula, but I still passed.
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Vicky

1 year ago
My hands trembled before I began, but pass4success gave me structured prep and real-time feedback that boosted my belief in myself. Stay determined—your breakthrough awaits!
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Gail

1 year ago
Just passed the IASSC Lean Six Sigma Green Belt exam! Thanks Pass4Success for the spot-on practice questions. Saved me so much time!
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Tiffiny

1 year ago
I started the exam day feeling nervous and unsure, but Pass4Success walked me through focused review strategies and practice tests, and I finished with confidence—to any future test-takers, you can do this too!
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Mollie

1 year ago
Just passed the IASSC Certified Lean Six Sigma Green Belt exam, and the Pass4Success practice questions were a big help. One question that stumped me was about defining project scope in the Define Phase. I wasn't entirely sure how to set the boundaries, but I managed to get through it.
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Adelle

1 year ago
Just got my Green Belt certification! Pass4Success was key to my quick and effective preparation.
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Xuan

1 year ago
I passed the IASSC Green Belt exam, and the Pass4Success practice questions were essential. There was a question in the Control Phase about using a control plan to maintain process improvements. I had some doubts about the elements to include, but I still passed.
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Maryln

1 year ago
IASSC Green Belt exam success! Thanks Pass4Success for the accurate practice questions.
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Amber

1 year ago
I successfully cleared the IASSC Certified Lean Six Sigma Green Belt exam, thanks to the Pass4Success practice questions. One challenging question was about implementing mistake-proofing techniques in the Improve Phase. I wasn't sure which poka-yoke method to apply, but I got through it.
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Linn

1 year ago
Passed IASSC Green Belt with flying colors! Pass4Success made all the difference in my prep.
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Noble

1 year ago
Green Belt certified! Pass4Success's exam questions were a perfect match for the real thing.
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Carmen

2 years ago
Sampling is crucial. Any final thoughts or advice for future test-takers?
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Nikita

2 years ago
Nailed the IASSC Green Belt exam! Pass4Success questions were spot on.
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Vinnie

2 years ago
My advice would be to focus on practical applications of concepts. The exam tests your ability to apply knowledge in real-world scenarios. And definitely use Pass4Success for prep - their questions were spot-on and saved me so much study time!
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Otis

2 years ago
Passed the exam with confidence! Thanks to Pass4Success for their comprehensive materials. The exam included questions on process performance metrics - know how to calculate and interpret yield, throughput, and cycle time.
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Carmelina

2 years ago
Just became a Lean Six Sigma Green Belt! Pass4Success helped me prepare in record time.
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Yong

2 years ago
Just got certified! Pass4Success's practice exams were incredibly helpful. The actual exam had several questions on team dynamics and leadership - understand different team roles and conflict resolution strategies.
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Darrel

2 years ago
Successfully passed the exam! Pass4Success's question bank was a lifesaver. The exam included questions on 5S methodology - understand each step and how it contributes to workplace organization.
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Donte

2 years ago
IASSC Green Belt exam conquered! Grateful for Pass4Success's relevant study materials.
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Catalina

2 years ago
Aced my Green Belt exam! Thanks to Pass4Success for their targeted prep materials. The exam had several questions on sampling strategies - understand different sampling methods and when to use them in data collection.
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Hillary

2 years ago
Excited to share that I passed the IASSC Green Belt exam, and the Pass4Success practice questions were very helpful. There was a question in the Analyze Phase about conducting a hypothesis test. I was unsure whether to use a t-test or an ANOVA, but I managed to pass.
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Jolene

2 years ago
Just earned my certification! Pass4Success's practice tests were invaluable. The exam included questions on stakeholder analysis - know how to create and interpret stakeholder matrices.
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Denny

2 years ago
Green Belt success! Pass4Success's practice tests were crucial for my last-minute preparation.
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Reid

2 years ago
The exam tested my understanding of visual management tools. Be prepared to identify and explain the purpose of different visual controls used in lean environments.
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Chantay

2 years ago
Successfully completed my LSSGB certification! Pass4Success's exam questions were spot-on. The exam had a focus on non-normal data analysis - understand when and how to use non-parametric tests.
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Dominga

2 years ago
I passed the IASSC Certified Lean Six Sigma Green Belt exam, and the Pass4Success practice questions were a great help. One tricky question was about measuring process performance using a histogram in the Measure Phase. I wasn't sure how to interpret the data distribution, but I still passed.
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Cristy

2 years ago
Passed my IASSC Green Belt today! Pass4Success made studying efficient and effective.
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Ashton

2 years ago
Just cleared the Green Belt exam! Thanks to Pass4Success for their comprehensive question bank. The exam included several questions on hypothesis testing - know when to use different tests!
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Broderick

2 years ago
Just passed the IASSC Green Belt exam, and the Pass4Success practice questions were crucial. There was a question in the Define Phase about creating a SIPOC diagram. I had some doubts about categorizing certain process steps, but I managed to get through it.
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Elouise

2 years ago
I successfully passed the IASSC Certified Lean Six Sigma Green Belt exam, and the Pass4Success practice questions were invaluable. One question that puzzled me was about control charts in the Control Phase. I wasn't entirely sure when to use an X-bar chart versus an R-chart, but I still passed.
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Eun

2 years ago
Voice of the Customer (VOC) was a key topic in my exam. Expect questions on VOC data collection methods and how to translate customer needs into measurable requirements.
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Samira

2 years ago
IASSC Green Belt certified! Pass4Success questions matched the real exam perfectly.
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Aron

2 years ago
Happy to share that I passed the IASSC Green Belt exam, and the Pass4Success practice questions were a big help. There was a question in the Improve Phase about selecting the best solution using a Pugh Matrix. I was a bit confused about the criteria weighting, but I got through it.
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Agustin

2 years ago
The exam tested my knowledge of control plans. Be ready to identify key elements of a control plan and understand how it relates to the Control phase of DMAIC.
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Cherelle

2 years ago
I passed the IASSC Certified Lean Six Sigma Green Belt exam, thanks to the Pass4Success practice questions. One challenging question was about root cause analysis in the Analyze Phase. I wasn't sure which tool to use between Fishbone Diagram and 5 Whys, but I still managed to pass.
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Lelia

2 years ago
Wow, aced the IASSC Green Belt test! Pass4Success materials were a lifesaver for quick prep.
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Mila

2 years ago
The exam tested my knowledge of DMAIC phases. Be prepared to sequence activities within each phase correctly. Understanding the logical flow of the DMAIC methodology is crucial.
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Denae

2 years ago
Just cleared the IASSC Green Belt exam, and the Pass4Success practice questions were a lifesaver. During the Measure Phase, there was a tricky question on calculating process capability indices like Cp and Cpk. I had some doubts about interpreting the results, but it all worked out in the end.
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Earlean

2 years ago
Just passed my IASSC Lean Six Sigma Green Belt exam! Grateful to Pass4Success for their spot-on practice questions. The exam had several questions on process mapping - make sure you can identify and interpret different types of process maps!
upvoted 0 times
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Bernadine

2 years ago
I recently passed the IASSC Certified Lean Six Sigma Green Belt exam, and I must say the Pass4Success practice questions were incredibly helpful. One question that stumped me was about identifying the Voice of the Customer (VOC) in the Define Phase. I wasn't entirely sure how to prioritize customer requirements effectively, but I managed to get through it.
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Johanna

2 years ago
Just passed the IASSC Lean Six Sigma Green Belt exam! Thanks Pass4Success for the spot-on practice questions.
upvoted 0 times
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Carin

2 years ago
My exam experience was successful as I passed the IASSC Certified Lean Six Sigma Green Belt exam using Pass4Success practice questions. The exam included topics such as Critical to Quality Characteristics and Statistical Process Control. One question that I found challenging was related to CTQ's, where I had to identify the key characteristics that directly impact customer satisfaction. Despite my initial uncertainty, I managed to select the correct answers and pass the exam.
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Cristy

2 years ago
Just passed the IASSC Lean Six Sigma Green Belt exam! Be prepared for questions on DMAIC methodology, especially in the Measure phase. Focus on understanding process capability and Sigma level calculations. Thanks to Pass4Success for the spot-on practice questions that helped me prepare efficiently!
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Salome

2 years ago
I passed the IASSC Certified Lean Six Sigma Green Belt exam with the help of Pass4Success practice questions. The exam covered topics like Six Sigma Roles & Responsibilities and Statistical Process Control. One question that stood out to me was about Gage Repeatability & Reproducibility, where I had to calculate the measurement system variation. Thankfully, I was able to answer it correctly and pass the exam.
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Free IASSC ICGB Exam Actual Questions

Note: Premium Questions for ICGB were last updated On Oct. 24, 2026 (see below)

Question #1

SPC on the outputs is more preferred than SPC on the inputs when implementing SPC for your process.

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Correct Answer: B

Question #2

The essence of Lean is to concentrate effort on removing waste while improving process flow to achieve speed and agility at lower cost.

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Correct Answer: A

Question #3

Kanbans work best with pull systems for determining the timing of which products or services are produced.

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Correct Answer: A

Question #4

If a process has Outliers which pair of charts is most preferable if subgroups will exist for the Continuous Data?

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Correct Answer: B

Question #5

Lean Six Sigma's general approach to solving significant challenges related to a process is called _________________.

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Correct Answer: C

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