Quality Practices & Measurement Flashcards
7 cards from real CPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Quality Practices & Measurement flashcards as text
What does 'DPMO' stand for in Six Sigma quality measurement?
Answer: Defects Per Million Opportunities
DPMO stands for Defects Per Million Opportunities, a metric used to quantify process quality on a common scale regardless of complexity.
When evaluating a supplier's quality system, which document would best show their process for handling nonconforming material?
Answer: Their nonconforming material procedure (NCR process)
A nonconforming material procedure (NCR process) documents how the supplier identifies, segregates, and disposes of defective material.
Which of the following is an example of 'mistake-proofing' (poka-yoke) in manufacturing?
Answer: A pin that prevents a part from being loaded incorrectly
A locating pin that only allows correct part orientation is a physical poka-yoke that prevents defects by making incorrect assembly impossible.
What is the main advantage of variables data over attributes data in SPC?
Answer: Variables data provides more information and detects shifts earlier
Variables data (actual measurements) contains more statistical information than pass/fail attributes data, enabling earlier detection of process changes with smaller samples.
A production lot of 500 parts is submitted for inspection. The AQL plan requires sampling 50 parts with an acceptance number of 3. If 4 defectives are found, the lot should be:
Answer: Rejected, because the defect count exceeds the acceptance number
When the number of defectives found (4) exceeds the acceptance number (3), the lot is rejected per the sampling plan.
What is the purpose of a 'measurement system analysis' (MSA) before launching a new production process?
Answer: To verify that the measurement system is capable of detecting process variation
MSA confirms that measurement variation is small relative to process variation and tolerances, ensuring measurements used for decisions are reliable.
Which quality document formally describes the inspection criteria, sample sizes, and measurement methods for a specific part?
Answer: Control plan
A control plan is the formal document that specifies what characteristics to inspect, how many to sample, what tools to use, and what reaction plan to follow.