TEXAS SIX SIGMA CERTIFICATION EXAM
WITH ACTUAL QUESTIONS AND VERIFIED
ANSWERS, PLUS EXPLAINED
RATIONALES/EXPERT VERIFIED FOR
GUARANTEED 100% PASS 2026/LATEST
UPDATE/INSTANT DOWNLOAD PDF
1. A manufacturing company in Texas is experiencing excessive
variation in the diameter of a machined shaft. The Six Sigma Black
Belt leading the project wants to determine whether the process is
statistically capable of meeting the customer specification of 25.00
± 0.10 mm. Which metric should be evaluated first?
A. Defects per Million Opportunities (DPMO)
B. Process Capability Index (Cp)
C. Return on Investment (ROI)
D. Voice of Customer (VOC)
Answer: B. Process Capability Index (Cp)
Rationale: Cp measures the potential capability of a process by
comparing specification width to process variation before accounting
for process centering. It is the primary metric used to determine if a
stable process can theoretically meet customer specifications.
2. During the Define phase of DMAIC, the project team develops a
SIPOC diagram. What is the primary purpose of this tool?
A. Determine statistical significance
B. Define process boundaries and major process elements
C. Calculate process sigma
1
,D. Perform hypothesis testing
Answer: B. Define process boundaries and major process elements
Rationale: SIPOC identifies Suppliers, Inputs, Process, Outputs, and
Customers, ensuring all stakeholders share a common understanding of
the process scope before detailed analysis begins.
3. Which statement best describes Critical-to-Quality (CTQ)
characteristics?
A. Financial metrics only
B. Customer-required measurable performance characteristics
C. Internal audit findings
D. Employee performance indicators
Answer: B. Customer-required measurable performance
characteristics
Rationale: CTQs translate customer requirements into measurable
operational specifications, ensuring improvement efforts focus on what
customers truly value.
4. A stable process has a Cp of 1.67 but a Cpk of 0.82. What does this
indicate?
A. Process variation exceeds specifications.
B. Process is perfectly centered.
C. Process has adequate spread but is poorly centered.
D. Process is unstable.
Answer: C. Process has adequate spread but is poorly centered.
2
,Rationale: A high Cp indicates sufficient capability if centered, while
the much lower Cpk reveals the process mean is shifted toward one
specification limit.
5. During the Measure phase, the team discovers inconsistent
inspection results between operators. Which action should occur
first?
A. Increase production.
B. Conduct Measurement System Analysis (MSA).
C. Implement corrective actions.
D. Calculate ROI.
Answer: B. Conduct Measurement System Analysis (MSA)
Rationale: Reliable data is essential before process analysis. MSA
evaluates repeatability and reproducibility to ensure measurement error
is acceptable.
6. What is the primary objective of the Analyze phase in DMAIC?
A. Develop marketing strategies
B. Identify verified root causes of variation
C. Hire new employees
D. Reduce inventory
Answer: B. Identify verified root causes of variation
Rationale: Analyze focuses on validating the true causes of defects using
statistical and analytical tools rather than assumptions.
3
, 7. Which graphical tool is most effective for identifying the "vital
few" causes responsible for most defects?
A. Histogram
B. Pareto Chart
C. Scatter Plot
D. Run Chart
Answer: B. Pareto Chart
Rationale: Pareto Charts apply the 80/20 principle, showing which
categories contribute most significantly to defects.
8. The Fishbone Diagram is also known as:
A. Box Plot
B. Ishikawa Diagram
C. Control Chart
D. Matrix Diagram
Answer: B. Ishikawa Diagram
Rationale: The Ishikawa Diagram organizes possible causes into
categories such as Methods, Machines, Materials, Manpower,
Measurement, and Environment.
9. Which hypothesis test compares the means of two independent
populations?
A. Chi-Square Test
B. Two-Sample t-Test
C. ANOVA
4
WITH ACTUAL QUESTIONS AND VERIFIED
ANSWERS, PLUS EXPLAINED
RATIONALES/EXPERT VERIFIED FOR
GUARANTEED 100% PASS 2026/LATEST
UPDATE/INSTANT DOWNLOAD PDF
1. A manufacturing company in Texas is experiencing excessive
variation in the diameter of a machined shaft. The Six Sigma Black
Belt leading the project wants to determine whether the process is
statistically capable of meeting the customer specification of 25.00
± 0.10 mm. Which metric should be evaluated first?
A. Defects per Million Opportunities (DPMO)
B. Process Capability Index (Cp)
C. Return on Investment (ROI)
D. Voice of Customer (VOC)
Answer: B. Process Capability Index (Cp)
Rationale: Cp measures the potential capability of a process by
comparing specification width to process variation before accounting
for process centering. It is the primary metric used to determine if a
stable process can theoretically meet customer specifications.
2. During the Define phase of DMAIC, the project team develops a
SIPOC diagram. What is the primary purpose of this tool?
A. Determine statistical significance
B. Define process boundaries and major process elements
C. Calculate process sigma
1
,D. Perform hypothesis testing
Answer: B. Define process boundaries and major process elements
Rationale: SIPOC identifies Suppliers, Inputs, Process, Outputs, and
Customers, ensuring all stakeholders share a common understanding of
the process scope before detailed analysis begins.
3. Which statement best describes Critical-to-Quality (CTQ)
characteristics?
A. Financial metrics only
B. Customer-required measurable performance characteristics
C. Internal audit findings
D. Employee performance indicators
Answer: B. Customer-required measurable performance
characteristics
Rationale: CTQs translate customer requirements into measurable
operational specifications, ensuring improvement efforts focus on what
customers truly value.
4. A stable process has a Cp of 1.67 but a Cpk of 0.82. What does this
indicate?
A. Process variation exceeds specifications.
B. Process is perfectly centered.
C. Process has adequate spread but is poorly centered.
D. Process is unstable.
Answer: C. Process has adequate spread but is poorly centered.
2
,Rationale: A high Cp indicates sufficient capability if centered, while
the much lower Cpk reveals the process mean is shifted toward one
specification limit.
5. During the Measure phase, the team discovers inconsistent
inspection results between operators. Which action should occur
first?
A. Increase production.
B. Conduct Measurement System Analysis (MSA).
C. Implement corrective actions.
D. Calculate ROI.
Answer: B. Conduct Measurement System Analysis (MSA)
Rationale: Reliable data is essential before process analysis. MSA
evaluates repeatability and reproducibility to ensure measurement error
is acceptable.
6. What is the primary objective of the Analyze phase in DMAIC?
A. Develop marketing strategies
B. Identify verified root causes of variation
C. Hire new employees
D. Reduce inventory
Answer: B. Identify verified root causes of variation
Rationale: Analyze focuses on validating the true causes of defects using
statistical and analytical tools rather than assumptions.
3
, 7. Which graphical tool is most effective for identifying the "vital
few" causes responsible for most defects?
A. Histogram
B. Pareto Chart
C. Scatter Plot
D. Run Chart
Answer: B. Pareto Chart
Rationale: Pareto Charts apply the 80/20 principle, showing which
categories contribute most significantly to defects.
8. The Fishbone Diagram is also known as:
A. Box Plot
B. Ishikawa Diagram
C. Control Chart
D. Matrix Diagram
Answer: B. Ishikawa Diagram
Rationale: The Ishikawa Diagram organizes possible causes into
categories such as Methods, Machines, Materials, Manpower,
Measurement, and Environment.
9. Which hypothesis test compares the means of two independent
populations?
A. Chi-Square Test
B. Two-Sample t-Test
C. ANOVA
4
