Inspection and Testing Methods Flashcards
6 cards from real CQE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Inspection and Testing Methods flashcards as text
In a gage R&R study, 'repeatability' measures variation due to:
Answer: The same operator measuring the same part multiple times with the same gage
Repeatability (Equipment Variation) is the variation observed when one operator repeatedly measures the same part with the same gauge under identical conditions, reflecting the gauge's inherent measurement uncertainty.
A process produces parts with a true mean of 50.1 mm against a target of 50.0 mm. The inspector's gauge consistently reads 50.3 mm. What type of measurement error is present?
Answer: Bias (accuracy error)
Bias is the systematic offset between the average measured value and the true (reference) value; here the gauge consistently reads 0.2 mm higher than the true part dimension.
What is the purpose of a receiving inspection skip-lot program?
Answer: To reduce inspection frequency for suppliers with proven quality history while maintaining quality protection
Skip-lot programs reduce inspection frequency for suppliers demonstrating consistent quality, lowering inspection costs while maintaining quality protection through periodic sampling.
In dimensional measurement, what does 'measurement uncertainty' represent?
Answer: The range within which the true value is expected to lie with a stated confidence level
Measurement uncertainty quantifies the doubt about a measurement result, expressing the range around the measured value within which the true value is expected to fall with a stated confidence level.
Which inspection sampling approach is used when the cost of inspection is very high but the cost of passing a defective is also very high?
Answer: 100% inspection (complete inspection)
When the consequences of defects reaching the customer are extremely high (safety-critical parts, high liability), 100% inspection is justified despite high cost to prevent any nonconforming units from escaping.
What is the purpose of attribute agreement analysis (AAA) in measurement system analysis?
Answer: To evaluate the consistency of operators making pass/fail decisions on the same parts
Attribute Agreement Analysis assesses how consistently operators classify parts as conforming or nonconforming by having multiple operators evaluate the same parts multiple times and measuring agreement rates.