Manufacturing and Production Six Sigma and Process Improvement 2

Question 1

What is a regression analysis used for in Six Sigma?

Accepted Answer

Identifying and quantifying the relationship between input variables and output outcomes

Answer

Regression analysis quantifies how changes in input variables (Xs) affect the output (Y) to guide targeted improvements.

Question 2

Design of Experiments (DOE) in Six Sigma is used to:

Accepted Answer

Systematically test multiple input variable combinations to optimize process outputs

Answer

DOE efficiently tests multiple factors simultaneously to identify which variables most significantly affect the process output.

Question 3

What does DPMO stand for?

Accepted Answer

Defects Per Million Opportunities

Answer

DPMO normalizes defect rates to a per-million scale, enabling comparison across processes with different complexity levels.

Question 4

In the Control phase of DMAIC, which tool is most commonly used to sustain improvements?

Accepted Answer

Control chart (SPC)

Answer

Statistical process control (SPC) charts are placed on the improved process in the Control phase to detect any drift back to old performance.

Question 5

What is a hypothesis test used for in Six Sigma projects?

Accepted Answer

Statistically determining whether observed differences between groups are real or due to chance

Answer

Hypothesis tests (like t-tests, ANOVA) validate whether process changes or differences are statistically significant.

Manufacturing and Production Practice Test