Lean Six Sigma Study Guide Exam with
Questions and Correct Answers 2025
Special Cause variation is - CORRECT ANSWERS is not random and changes over
time
5%-15% of all variation
The box on a Boxplot contains what % of the data? - CORRECT ANSWERS 50%
What is the elapsed time from completion of one type of task to beginning of work on
another type of task? - CORRECT ANSWERS Setup time
Throughput is often defined as what? - CORRECT ANSWERS Exit Rate
What are the primarily form of the Voice of the Customer - CORRECT ANSWERS
Quality, Cost and Speed
The SIPOC Chart - CORRECT ANSWERS Helps to identify the customers, supplier and
outputs
Process/Value Stream Maps: - CORRECT ANSWERS Are valuable for describing the
current situation
What basic tool would you most logically use to supplement brainstorming to prioritize
ideas? - CORRECT ANSWERS Nominal Group Technique
The control limits on a control chart are? - CORRECT ANSWERS Boundaries that
result from the process itself
What type of Control Chart would be used to track defects? - CORRECT ANSWERS C
Charts
What process capability ratio would you use to determine if the process performance
potentially can fit within the range of the upper and lower specification limits (process
centering is not an issue) - CORRECT ANSWERS Cp
A Cpk value less than zero indicates that most of the data points fall: - CORRECT
ANSWERS Outside the specification limits
The Takt Rate can be described as? - CORRECT ANSWERS Number of units to
process divided by Net Process Time Available
, An example of a Type II error is: - CORRECT ANSWERS I have missed a significant
event
The value of the Power of a test is: - CORRECT ANSWERS One minus the beta level
How do you describe the interpretation of the p-value in a statistical test? - CORRECT
ANSWERS 1. If we reject the null hypothesis, the p-value is the probability of being
wrong
2. If we reject the null hypothesis, the p-value is the probability of making a Type I error
3. If we don't want alpha to be more than 0.05, then we simply accept the alternate
hypothesis when the p-value is 0.05 or less
What's true about a Rapid Improvement Event - CORRECT ANSWERS It's a Bias for
Action
What's the major ranking criteria in an FMEA? - CORRECT ANSWERS 1. Severity
2. Occurrence
3. Detection
When would you use Multiple Regression Analysis? - CORRECT ANSWERS When you
have more than one independent variable
ANOVA looks at what sources of variation - CORRECT ANSWERS 1. Total
2. Between
3. Within
What's the governing principle of Work Control System - CORRECT ANSWERS Start
Rate= Exit Rate
Complexity is found in many areas of business, in which ways can complexity be
reduced? - CORRECT ANSWERS 1. Standardization
2. Value Optimizing
3. Lean Six Sigma Improvements
When should you use a Replenishment Pull System? - CORRECT ANSWERS During a
repetitive environment
When should a Rapid Improvement Event be performed? - CORRECT ANSWERS 1.
To get employees involved in waste elimination
2. Driving quick hit value
3. For a focused 3 to 5 day event
What are the Five S's? - CORRECT ANSWERS 1. Sort
Questions and Correct Answers 2025
Special Cause variation is - CORRECT ANSWERS is not random and changes over
time
5%-15% of all variation
The box on a Boxplot contains what % of the data? - CORRECT ANSWERS 50%
What is the elapsed time from completion of one type of task to beginning of work on
another type of task? - CORRECT ANSWERS Setup time
Throughput is often defined as what? - CORRECT ANSWERS Exit Rate
What are the primarily form of the Voice of the Customer - CORRECT ANSWERS
Quality, Cost and Speed
The SIPOC Chart - CORRECT ANSWERS Helps to identify the customers, supplier and
outputs
Process/Value Stream Maps: - CORRECT ANSWERS Are valuable for describing the
current situation
What basic tool would you most logically use to supplement brainstorming to prioritize
ideas? - CORRECT ANSWERS Nominal Group Technique
The control limits on a control chart are? - CORRECT ANSWERS Boundaries that
result from the process itself
What type of Control Chart would be used to track defects? - CORRECT ANSWERS C
Charts
What process capability ratio would you use to determine if the process performance
potentially can fit within the range of the upper and lower specification limits (process
centering is not an issue) - CORRECT ANSWERS Cp
A Cpk value less than zero indicates that most of the data points fall: - CORRECT
ANSWERS Outside the specification limits
The Takt Rate can be described as? - CORRECT ANSWERS Number of units to
process divided by Net Process Time Available
, An example of a Type II error is: - CORRECT ANSWERS I have missed a significant
event
The value of the Power of a test is: - CORRECT ANSWERS One minus the beta level
How do you describe the interpretation of the p-value in a statistical test? - CORRECT
ANSWERS 1. If we reject the null hypothesis, the p-value is the probability of being
wrong
2. If we reject the null hypothesis, the p-value is the probability of making a Type I error
3. If we don't want alpha to be more than 0.05, then we simply accept the alternate
hypothesis when the p-value is 0.05 or less
What's true about a Rapid Improvement Event - CORRECT ANSWERS It's a Bias for
Action
What's the major ranking criteria in an FMEA? - CORRECT ANSWERS 1. Severity
2. Occurrence
3. Detection
When would you use Multiple Regression Analysis? - CORRECT ANSWERS When you
have more than one independent variable
ANOVA looks at what sources of variation - CORRECT ANSWERS 1. Total
2. Between
3. Within
What's the governing principle of Work Control System - CORRECT ANSWERS Start
Rate= Exit Rate
Complexity is found in many areas of business, in which ways can complexity be
reduced? - CORRECT ANSWERS 1. Standardization
2. Value Optimizing
3. Lean Six Sigma Improvements
When should you use a Replenishment Pull System? - CORRECT ANSWERS During a
repetitive environment
When should a Rapid Improvement Event be performed? - CORRECT ANSWERS 1.
To get employees involved in waste elimination
2. Driving quick hit value
3. For a focused 3 to 5 day event
What are the Five S's? - CORRECT ANSWERS 1. Sort
