IASSC Certified Lean Six Sigma Black Belt

Here you have the best Six Sigma ICBB practice exam questions

  • You have 243 total questions to study from
  • Each page has 5 questions, making a total of 49 pages
  • You can navigate through the pages using the buttons at the bottom
  • This questions were last updated on November 20, 2025
  • This site is not affiliated with or endorsed by Six Sigma.
Question 1 of 243
A ___________ is used primarily to track the stability of the average value of a metric of interest.
    Correct Answer: B

Question 2 of 243
The Control Limits width varies if the sample size varies for which type of chart?
    Correct Answer: A

    The control limits in a P-chart, which is used for plotting the proportion of defectives, vary with changes in sample size. Because the control limits are calculated using the sample size (n), differing sample sizes from one subgroup to another will result in different control limits.

Question 3 of 243
Which of these elements are not included in Implementation plans?
    Correct Answer: C

    Cost/Benefit ratios are typically included in the business case or project charter rather than in implementation plans. Implementation plans more commonly include a work breakdown structure, risk management plans, and planned audits of work completion.

Question 4 of 243
Upon completion and validation of an improvement to a process a Belt and the Project Team create a Control Plan that contains which of these?
    Correct Answer: D

Question 5 of 243
What conclusion is most correct about the Experimental Design shown here with the response in the far right column?
Exam ICBB: Question 5 - Image 1
    Correct Answer: D