Lean Manufacturing Quality & Performance Metrics — Questions and Answers
Question 1: Which metric measures the number of defects per million opportunities?
- OEE
- DPMO (Correct answer)
- ROI
- 5S Score
Correct answer: DPMO
DPMO (Defects Per Million Opportunities) quantifies quality by showing how many defects occur in a million chances for error.
Question 2: What does OEE stand for in performance metrics?
- Overall Employee Engagement
- Overall Equipment Efficiency
- Overall Equipment Effectiveness (Correct answer)
- Operational Excellence Evaluation
Correct answer: Overall Equipment Effectiveness
OEE (Overall Equipment Effectiveness) evaluates how efficiently manufacturing equipment is being used.
Question 3: Which performance metric tracks how long it takes to produce a product from start to finish?
- Takt time
- Cycle time (Correct answer)
- Lead conversion rate
- Downtime frequency
Correct answer: Cycle time
Cycle time measures the total time required to complete one unit of production, highlighting process efficiency.
Question 4: Why is First Pass Yield (FPY) a valuable metric?
- It calculates total employee hours
- It tracks customer surveys
- It measures defect-free output on the first attempt (Correct answer)
- It reports sales revenue
Correct answer: It measures defect-free output on the first attempt
FPY measures the percentage of products that meet quality standards without rework, reflecting process effectiveness.
Question 5: Which metric is used to align production with customer demand?
- Scrap rate
- Changeover time
- Takt time (Correct answer)
- Inventory turnover
Correct answer: Takt time
Takt time ensures production pace meets customer demand by calculating the rate at which products must be made.
Question 6: What is the purpose of tracking defect rate?
- To plan employee vacations
- To adjust marketing efforts
- To monitor quality through error frequency (Correct answer)
- To calculate floor space usage
Correct answer: To monitor quality through error frequency
Defect rate helps assess product quality and identify areas for improvement by measuring the frequency of errors.
Lean Manufacturing Quality & Performance Metrics
Which metric measures the number of defects per million opportunities?