SQA Common 4 — Questions and Answers
Question 1: What is the purpose of a Control Plan in a quality management system?
- To document process controls and inspection methods for key product characteristics (Correct answer)
- To outline corrective actions for all past nonconformances
- To define the organizational structure of the quality department
- To specify customer complaint escalation procedures
Correct answer: To document process controls and inspection methods for key product characteristics
A Control Plan documents the controls, measurements, and reaction plans used to manage and monitor key product and process characteristics.
Question 2: In the PDCA (Plan-Do-Check-Act) cycle, what is the primary purpose of the 'Check' phase?
- To evaluate results against the planned objectives (Correct answer)
- To implement the planned changes
- To standardize the successful improvements
- To identify problems that need solving
Correct answer: To evaluate results against the planned objectives
The Check phase involves analyzing data collected during the Do phase to assess whether the change achieved the desired outcome.
Question 3: What is a 'Certificate of Conformance' (CoC) used for in quality assurance?
- To attest that a product or service meets specified requirements (Correct answer)
- To document a supplier's audit results
- To authorize rework on nonconforming material
- To record customer complaints
Correct answer: To attest that a product or service meets specified requirements
A Certificate of Conformance is a supplier's written declaration that their product meets all applicable specifications and requirements.
Question 4: Which risk priority metric in FMEA is calculated by multiplying Severity, Occurrence, and Detection ratings?
- Risk Priority Number (RPN) (Correct answer)
- Process Capability Index (Cpk)
- Defects Per Million Opportunities (DPMO)
- Overall Equipment Effectiveness (OEE)
Correct answer: Risk Priority Number (RPN)
The Risk Priority Number (RPN) = Severity × Occurrence × Detection and is used to rank failure modes for prioritizing corrective actions.
Question 5: In a Measurement System Analysis (MSA), what does 'reproducibility' measure?
- Variation in measurements when different operators measure the same part (Correct answer)
- Variation when the same operator measures the same part repeatedly
- The difference between the measured value and the true value
- The smallest detectable change in measurement
Correct answer: Variation in measurements when different operators measure the same part
Reproducibility captures the variation in average measurements made by different operators using the same gauge on the same part.
Question 6: What is the key principle behind 'mistake-proofing' (poka-yoke) in quality management?
- Designing processes or products so that errors are impossible or immediately detectable (Correct answer)
- Training operators to eliminate all human errors
- Using statistical sampling to catch mistakes before shipment
- Implementing double-inspection procedures for critical parts
Correct answer: Designing processes or products so that errors are impossible or immediately detectable
Poka-yoke devices or methods physically prevent errors or immediately alert operators to mistakes, reducing reliance on human vigilance.
Question 7: What does 'nonconforming material' refer to in quality assurance?
- Material or product that fails to meet one or more specified requirements (Correct answer)
- Supplier material received without documentation
- Material that has exceeded its shelf life
- Any material returned by a customer
Correct answer: Material or product that fails to meet one or more specified requirements
Nonconforming material is any product, part, or material that does not meet the defined specifications or acceptance criteria.
SQA Common 4
What is the purpose of a Control Plan in a quality management system?