Free EXIN LSSA Lean Six Sigma Yellow Belt Practice Questions

Sample Practice Questions

Try these 10 sample questions from the EXIN LSSA Lean Six Sigma Yellow Belt practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1What was the origin of the Toyota Production System's jidoka concept?

   1. A.A system that replenishes parts after they are withdrawn
   2. B.A loom that incorporated the ability to make judgmentsCorrect answer: B
   3. C.A line that moved work through fixed assembly stations
   4. D.A process for scheduling mixed batches of vehicles

   Explanation: Toyota explains that the automatic loom "built the capability to make judgments into the machine itself." It identifies this as the origin of jidoka.

   Reference: Toyota Production System — Origin of the Toyota Production System, Roots of the Toyota Production System

2. 2In lean management, what does an organization's True North express?

   1. A.A temporary plan for a single improvement project
   2. B.A record of current performance against this month's target
   3. C.Its strategic and philosophical vision or purposeCorrect answer: C
   4. D.A detailed work instruction for a specific task

   Explanation: The Lean Enterprise Institute defines True North as an "organization’s strategic and philosophical vision or purpose".

   Reference: True North — True North, definition

3. 3A team is defining a problem about late customer orders. Which statement describes the gap in a measurable way?

   1. A.The current on-time delivery rate is 82%, compared with the customer requirement of 95%.Correct answer: A
   2. B.Customers would be happier if the delivery process were improved in some way.
   3. C.The team should immediately install a new scheduling system for every order.
   4. D.The shipping department needs to perform much better than it did previously.

   Explanation: The Lean Enterprise Institute describes a good problem statement as the "difference between our target condition and our actual condition stated in observable and measureable terms". The rate and requirement make that difference explicit.

   Reference: Why Effective Problem Solving Begins With a Good Problem Statement — Problem Solving, problem statement definition

4. 4A team separates needed tools from unneeded tools and removes the latter. Which 5S activity is this?

   1. A.Shine
   2. B.Straighten
   3. C.SortCorrect answer: C
   4. D.Sustain

   Explanation: The 5S description says to "Separate needed from unneeded items" and discard the unneeded. This is Sort.

   Reference: 5S — 5S, Seiri

5. 5In a visual workplace, which comparison helps a team recognize an abnormal process condition?

   1. A.One future improvement target against another target
   2. B.Actual performance against the defined process standardCorrect answer: B
   3. C.Two unverified explanations for the same process problem
   4. D.Past process observations without a defined normal standard

   Explanation: The Lean Enterprise Institute describes "Making visible normal from abnormal" as a purpose of visual management. Comparing actual process conditions with the defined standard helps identify an abnormality.

   Reference: Visual Management: Good, Bad, and Ugly — Better

6. 6In a SIPOC diagram, which element identifies who provides materials or information to the process?

   1. A.Customers
   2. B.SuppliersCorrect answer: B
   3. C.Outputs
   4. D.Process steps

   Explanation: ASQ describes suppliers as those who "provides the raw materials, information, or technology to the process".

   Reference: SIPOC+CM Diagram — SIPOC+CM Diagram Procedure, Suppliers

7. 7How does a special cause of variation differ from a common cause?

   1. A.It can be intermittent and affect only some process outputs.Correct answer: A
   2. B.It is inherent in every output of the process.
   3. C.It is always identical to ordinary process variation.
   4. D.It must affect every observation by the same amount.

   Explanation: NIST describes a special cause as "intermittent or unpredictable, affecting only some of the individual values" of process output.

   Reference: NIST/SEMATECH e-Handbook Glossary — Special cause

8. 8According to Toyota, what is the intended relationship between waste elimination and lead time in its production system?

   1. A.Reduce lead time by delaying waste elimination
   2. B.Reduce waste while allowing lead time to grow
   3. C.Reduce both waste and process lead timeCorrect answer: C
   4. D.Focus on output volume without reducing waste

   Explanation: Toyota states its objective is to "eliminate waste and shorten lead times" so vehicles reach customers quickly.

   Reference: Toyota Production System — Toyota Production System, introduction

9. 9Which combination illustrates the kinds of elements that True North may bring together?

   1. A.A profit objective and a broader organizational purposeCorrect answer: A
   2. B.A past profit figure and the same period's revenue figure
   3. C.A workstation's cycle time and its daily production count
   4. D.A task instruction and the schedule for checking it

   Explanation: The definition says True North can include "business goals such as revenue and profits" as well as visionary objectives. It is not limited to operational records.

   Reference: True North — True North, definition

10. 10Which statement describes a customer-service problem rather than prescribing a solution?

    1. A.Install an automated reminder system for overdue requests.
    2. B.Assign another person to answer every overdue request.
    3. C.Service requests exceed the two-day response target in 18% of cases.Correct answer: C
    4. D.Replace the current request-tracking software with a new platform.

    Explanation: The author identifies "state our predetermined solution as a problem" as a common problem-statement issue. A remedy is not a description of the gap.

    Reference: Why Effective Problem Solving Begins With a Good Problem Statement — Problem Solving, introduction