IASSC Certified Lean Six Sigma Yellow Belt

Here you have the best Six Sigma ICYB practice exam questions

You have 120 total questions across 24 pages (5 per page)
These questions were last updated on February 17, 2026
This site is not affiliated with or endorsed by Six Sigma.

Question 1 of 120

When a process has proven itself to function at a Six Sigma level this means there are less than ________ defects per million opportunities.

1.7

2.6

3.4

Question 2 of 120

Six Sigma refers to a process whose output has at least 95% of its data points within 6 Standard Deviations from the Mean.

True

False

Question 3 of 120

Training cost is $3,000 and a project required an initial investment of $12,000. If the project yields monthly savings of $1,800 beginning after 3 months, what is the payback period in months (before money costs and taxes)?

4.17

8.33

11.33

28.28

Question 4 of 120

The ROI for a project is a measurement metric that stands for Return on Investment and is one of the methods used to measure the success of a Lean Six Sigma project.

True

False

Question 5 of 120

The DMAIC approach to problem solving stands for Define, __________, Analyze, Improve and Control.

Manage

Measure

Memorize

Manipulate

About the Six Sigma ICYB Certification Exam

About the Exam

The Six Sigma ICYB (IASSC Certified Lean Six Sigma Yellow Belt) validates your knowledge and skills. Passing demonstrates proficiency and can boost your career prospects in the field.

How to Prepare

Work through all 120 practice questions across 24 pages. Focus on understanding the reasoning behind each answer rather than memorizing responses to be ready for any variation on the real exam.

Why Practice Exams?

Practice exams help you familiarize yourself with the question format, manage your time, and reduce anxiety on the test day. Our ICYB questions are regularly updated to reflect the latest exam objectives.