CPP Quality Management & Performance Metrics 2 — Questions and Answers
Question 1: A process owner notices that defect rates fluctuate between 2% and 8% with no identifiable pattern. This is most likely an example of:
- Special cause variation
- Common cause variation (Correct answer)
- Assignable cause variation
- Systemic failure
Correct answer: Common cause variation
Random fluctuation within a stable range without identifiable triggers indicates common cause variation inherent to the process.
Question 2: Which quality cost category includes expenses for inspecting incoming raw materials from suppliers?
- Prevention costs
- Internal failure costs
- Appraisal costs (Correct answer)
- External failure costs
Correct answer: Appraisal costs
Appraisal costs cover activities like inspection, testing, and auditing performed to detect defects before products reach customers.
Question 3: A CPP practitioner wants to measure how efficiently a process converts inputs to outputs. Which metric is most appropriate?
- Cycle time
- Process yield
- Throughput efficiency (Correct answer)
- Takt time
Correct answer: Throughput efficiency
Throughput efficiency measures value-added time as a percentage of total cycle time, directly quantifying input-to-output conversion efficiency.
Question 4: The PDCA cycle was originally developed by which quality pioneer?
- Joseph Juran
- Philip Crosby
- Walter Shewhart (Correct answer)
- Genichi Taguchi
Correct answer: Walter Shewhart
Walter Shewhart developed the PDCA (Plan-Do-Check-Act) cycle, which was later popularized by W. Edwards Deming.
Question 5: A process produces 950 acceptable units out of 1,000. The First Pass Yield (FPY) is:
- 5%
- 90%
- 95% (Correct answer)
- 9.5%
Correct answer: 95%
FPY = (Units passing without rework / Total units started) × 100 = (950/1000) × 100 = 95%.
Question 6: Which tool is most effective for identifying the root cause of a quality problem by systematically exploring cause-and-effect relationships?
- Pareto chart
- Scatter diagram
- Ishikawa diagram (Correct answer)
- Histogram
Correct answer: Ishikawa diagram
The Ishikawa (fishbone) diagram maps cause-and-effect relationships across categories like people, process, equipment, and materials.
Question 7: In the context of quality management, 'Voice of the Customer' (VOC) data is primarily used to:
- Set internal process control limits
- Translate customer needs into process requirements (Correct answer)
- Calculate defect rates
- Define supplier quality standards
Correct answer: Translate customer needs into process requirements
VOC data captures customer expectations and requirements, which are then translated into measurable process and product specifications.
CPP Quality Management & Performance Metrics 2
A process owner notices that defect rates fluctuate between 2% and 8% with no identifiable pattern.
This is most likely an example of: