Manufacturing and Production Six Sigma and Process Improvement 1 — Questions and Answers
Question 1: What does DMAIC stand for in Six Sigma?
- Design, Manage, Analyze, Implement, Control
- Define, Measure, Analyze, Improve, Control (Correct answer)
- Detect, Monitor, Assess, Inspect, Correct
- Develop, Map, Apply, Integrate, Complete
Correct answer: Define, Measure, Analyze, Improve, Control
DMAIC is the structured Six Sigma problem-solving methodology: Define, Measure, Analyze, Improve, Control.
Question 2: A Six Sigma process has a defect rate of approximately:
- 1 defect per 100 opportunities
- 3.4 defects per million opportunities (Correct answer)
- 1 defect per 10,000 opportunities
- 6 defects per thousand opportunities
Correct answer: 3.4 defects per million opportunities
Six Sigma quality corresponds to no more than 3.4 defects per million opportunities (DPMO), representing near-perfect quality.
Question 3: In Six Sigma, what is a 'Black Belt'?
- A supervisor with 10+ years of manufacturing experience
- A full-time Six Sigma practitioner trained to lead improvement projects (Correct answer)
- A safety certification level
- A machine operator certification
Correct answer: A full-time Six Sigma practitioner trained to lead improvement projects
Black Belts are certified Six Sigma experts who lead complex improvement projects and mentor Green Belts.
Question 4: What is the purpose of a process capability study?
- Determine maximum machine speed
- Assess how well a process meets specification requirements statistically (Correct answer)
- Measure employee productivity
- Schedule production changeovers
Correct answer: Assess how well a process meets specification requirements statistically
A process capability study uses Cp, Cpk, and related indices to quantify the ability of a process to produce within specifications.
Question 5: In the Measure phase of DMAIC, the primary goal is to:
- Identify root causes of the problem
- Establish a baseline performance measurement for the process (Correct answer)
- Implement improvement solutions
- Sustain the gains achieved
Correct answer: Establish a baseline performance measurement for the process
The Measure phase quantifies current process performance to establish a data-driven baseline before analysis begins.
Question 6: What is a 'sigma level' used to describe?
- Machine vibration frequency
- How many standard deviations a process fits between its mean and specification limits (Correct answer)
- Employee skill rating
- A measurement unit for product weight
Correct answer: How many standard deviations a process fits between its mean and specification limits
Sigma level indicates process performance by measuring the distance between the process mean and specification limits in standard deviations.
Manufacturing and Production Six Sigma and Process Improvement 1
What does DMAIC stand for in Six Sigma?