IASSC Certified Lean Six Sigma Black Belt

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QUESTION 1
A ___________ is used primarily to track the stability of the average value of a metric of interest.

A. NP Chart
B. Xbar-R Chart
C. I-MR Chart
D. C Chart

Answer: B

Explanation:

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QUESTION 2
For her injection molding project a Belt needed to track the percentage of defectives of a particular
sample set so she used a ___________ to display the data?

A. Individual Chart
B. C Chart
C. Xbar Chart
D. P Chart

Answer: D

Explanation:

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QUESTION 3
Which of these graphs demonstrates conditions which would be sufficient to enable OCAP for the
process?

A. Xbar Chart
B. Time Series Chart
C. Neither
D. Both

Answer: A

Explanation:

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QUESTION 4
Control Charts were developed by Dr. Shewhart to track data over time. To detect Special Cause
variation the Control Charts use which of these?

A. Data shift analysis
B. Outlier analysis methods
C. Center Line and Control Limits
D. None of the above

Answer: C

Explanation:

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QUESTION 5
Common and ______________ Cause Variation are the focus of Statistical Process Control.

A. Uncommon
B. Ordinary
C. Special
D. Selective

Answer: C

Explanation:

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ICYB: IASSC Certified Lean Six Sigma Yellow Belt

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QUESTION 1
When a process has proven itself to function at a Six Sigma level this means there are less than
________ defects per million opportunities.

A. 1.7
B. 2.6
C. 3.4
D. 10

Answer: C

Explanation:

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QUESTION 2
Six Sigma refers to a process whose output has at least 95% of its data points within 6 Standard
Deviations from the Mean.

A. True
B. False

Answer: B

Explanation:

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QUESTION 3
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)?

A. 4.17
B. 8.33
C. 11.33
D. 28.28

Answer: C

Explanation:

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QUESTION 4
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.

A. True
B. False

Answer: A

Explanation:

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QUESTION 5
The DMAIC approach to problem solving stands for Define, __________, Analyze, Improve and
Control.

A. Manage
B. Measure
C. Memorize
D. Manipulate

Answer: B

Explanation:

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