DMAIC: Measure Phase Tools Flashcards
7 cards from real Lean Six Sigma Green Belt Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 DMAIC: Measure Phase Tools flashcards as text
When performing a capability study, a practitioner finds the data is right-skewed. What is the BEST next step before calculating Cp and Cpk?
Answer: Transform the data or use non-normal capability analysis methods
Standard Cp and Cpk formulas assume normality; skewed data requires transformation (e.g., Box-Cox) or non-normal capability methods to avoid misleading results.
In a value stream map created during the Measure phase, 'push' production is characterized by:
Answer: Producing based on a schedule or forecast regardless of downstream demand
Push systems produce based on schedules or forecasts and send output downstream whether or not it is needed, often creating excess inventory (waste).
A Green Belt calculates process cycle efficiency (PCE) as 12%. This means:
Answer: Only 12% of total lead time adds value from the customer's perspective
PCE = Value-Added Time / Total Lead Time; a 12% PCE means 88% of the time the product spends in the process is non-value-added (waste).
Which data collection tool uses a grid to tally how often different types of defects occur, enabling pattern recognition by defect type and location?
Answer: Check sheet
A check sheet is a structured form used to collect and organize data about defect types, locations, or frequencies in real time at the source.
A measurement system shows high repeatability variation. Which action would most directly address this?
Answer: Recalibrate the instrument or investigate instrument condition
Repeatability variation (same appraiser, same part, same instrument varies) typically points to the instrument itself — calibration, wear, or inconsistency in the gauge.
What is the purpose of calculating the intraclass correlation coefficient (ICC) in a measurement system analysis?
Answer: To assess the reliability of the measurement system by comparing measurement variation to total variation
ICC quantifies how much of the observed variation is due to real differences between items rather than measurement error, indicating measurement system reliability.
A team is measuring cycle time for a loan approval process. The data has extreme outliers on the high end. Which measure of central tendency should they report as most representative?
Answer: Median
The median is resistant to extreme outliers, making it a better measure of central tendency than the mean when data is heavily skewed or has extreme values.