Quality Assurance & Improvement Flashcards
7 cards from real LMC 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 Assurance & Improvement flashcards as text
A Lean team uses a scatter diagram to analyze the relationship between oven temperature and product defect rate. A strong positive correlation would indicate:
Answer: As temperature increases, defect rate increases proportionally
A strong positive correlation on a scatter diagram means that as one variable increases, the other increases as well, suggesting a cause-effect relationship to investigate.
In a Lean environment, which action best demonstrates respect for people as part of quality culture?
Answer: Empowering frontline workers to stop the line and report quality issues without fear
Lean quality culture respects workers by trusting and empowering them to identify and escalate quality problems, making quality everyone's responsibility.
A process has a Cp of 1.5 but a Cpk of 0.9. This most likely means:
Answer: The process has sufficient spread but is off-center relative to the specification
When Cp is high but Cpk is lower, the process variation fits within the spec limits but is not centered, causing one-sided nonconformance.
Which of the following is a key difference between quality control (QC) and quality assurance (QA) in a Lean context?
Answer: QA focuses on preventive process systems; QC focuses on detecting and correcting defects in product
QA is proactive and system-focused (ensuring processes prevent defects), while QC is reactive and product-focused (detecting defects after they occur).
An andon system in a Lean plant is activated. What is the expected first response?
Answer: The team leader goes to the station to assess and either resolve or stop the line
When an andon is activated, the team leader responds immediately to the problem location to assess the situation and decide whether to continue or stop production.
In Lean quality improvement, 'mistake-proofing at the source' is preferred over 'inspection at the end' because:
Answer: End-of-line inspection is more expensive and allows defects to accumulate throughout production
Source mistake-proofing prevents defects from being produced in the first place, avoiding the cost and waste of processing nonconforming units through the entire production chain.
A team is implementing Statistical Process Control (SPC) for the first time. Which condition must exist before SPC charts provide meaningful guidance?
Answer: The process must be in a state of statistical control (only common cause variation present)
SPC charts are meaningful only when the process is stable (in control), because special cause variation must first be eliminated to establish a reliable baseline.