The Lean Six Sigma Yellow Belt exam is structured around the five phases of the DMAIC roadmap. I have engineered these practice tests to ensure you are proficient in the following areas:

• Define (20%)

  • Developing Project Charters and defining clear project scope.

  • Voice of the Customer (VOC) and identifying Critical to Quality (CTQ) requirements.

• Measure (20%)

  • Data collection plans and understanding process capability.

  • Calculating basic Six Sigma metrics like DPMO and Yield.

• Analyze (20%)

  • Root Cause Analysis using tools like Fishbone Diagrams and 5 Whys.

  • Identifying waste (Muda) and non-value-added activities.

• Improve/Implement (20%)

  • Brainstorming solutions and implementing Pilot programs.

  • Applying Lean tools like 5S, Poka-Yoke (Error Proofing), and Kaizen.

• Control (20%)

  • Creating Control Plans to sustain improvements.

  • Using Statistical Process Control (SPC) charts to monitor performance.

Course Description

Securing a Lean Six Sigma Yellow Belt certification is about proving you can speak the language of efficiency. Many students struggle not with the concepts, but with how those concepts are applied in tricky, situational exam questions. I created this comprehensive bank of 1,500 practice questions to remove the guesswork from your preparation and help you pass on your very first attempt.

Every question I provide includes a deep-dive explanation for the correct answer and a breakdown of why the other five options are incorrect. This "active learning" approach ensures you understand the nuances between similar tools—like when to use a Pareto Chart versus a Histogram. By the time you finish these tests, the DMAIC methodology will be second nature to you.

Practice Question Previews

Question 1: The Define Phase A project team is creating a document that outlines the business case, project scope, and the problem statement. Which tool are they primarily developing?

• Options:

  • A) SIPOC Diagram

  • B) Project Charter

  • C) Control Plan

  • D) Ishikawa Diagram

  • E) Value Stream Map

  • F) Standard Operating Procedure (SOP)

• Correct Answer: B

• Explanation:

  • A) Incorrect: A SIPOC identifies Suppliers, Inputs, Processes, Outputs, and Customers, but doesn't define the business case.

  • B) Correct: The Project Charter is the "contract" for the project, containing the scope, goals, and problem statement.

  • C) Incorrect: A Control Plan is used in the final phase to sustain gains.

  • D) Incorrect: This is a Root Cause tool used in the Analyze phase.

  • E) Incorrect: A VSM is a visual representation of the flow of materials and information.

  • F) Incorrect: An SOP is a detailed instruction for a specific task.

Question 2: Identifying Waste During a process walkthrough, an observer notices that employees are frequently walking across the warehouse to retrieve labels from a printer located far from their workstations. In Lean methodology, which type of waste (Muda) is this?

• Options:

  • A) Overproduction

  • B) Defects

  • C) Inventory

  • D) Motion

  • E) Waiting

  • F) Transportation

• Correct Answer: D

• Explanation:

  • A) Incorrect: Overproduction is making more than the customer requires.

  • B) Incorrect: Defects are errors that require rework.

  • C) Incorrect: Inventory is excess stock sitting idle.

  • D) Correct: Motion refers to unnecessary physical movement by the person (walking, reaching, etc.).

  • E) Incorrect: Waiting is idle time caused by upstream delays.

  • F) Incorrect: Transportation is the unnecessary movement of products or materials, not people.

Question 3: The Control Phase Which tool is most effective for a Yellow Belt to use to ensure a process remains stable and to distinguish between "common cause" and "special cause" variation?

• Options:

  • A) Check Sheet

  • B) Flowchart

  • C) Control Chart

  • D) Scatter Diagram

  • E) Pareto Chart

  • F) FMEA (Failure Mode and Effects Analysis)

• Correct Answer: C

• Explanation:

  • A) Incorrect: A Check Sheet is simply for data collection.

  • B) Incorrect: A Flowchart maps out the steps of a process.

  • C) Correct: A Control Chart uses statistical limits to monitor process stability over time.

  • D) Incorrect: A Scatter Diagram tests the relationship between two variables.

  • E) Incorrect: A Pareto Chart is used to prioritize problems based on frequency.

  • F) Incorrect: FMEA is a risk assessment tool used to prevent failures.

Course Highlights

• Welcome to the Exams Practice Tests Academy to help you prepare for your Lean Six Sigma Yellow Belt Certification.

  • You can retake the exams as many times as you want.

  • This is a huge original question bank with 1,500 unique entries.

  • You get support from instructors if you have questions.

  • Each question has a detailed explanation for every option.

  • Mobile-compatible with the Udemy app for studying anywhere.

  • 30-days money-back guarantee if you're not satisfied.

I hope that by now you're convinced! I’ve put a lot of work into these questions to ensure your success. I'll see you in the course.