The Measure Phase Flashcards
7 cards from real Lean Six Sigma Yellow 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 The Measure Phase flashcards as text
Which data collection technique involves observing the actual process in real time rather than relying on historical records?
Answer: Direct observation (gemba)
Direct observation (going to the gemba, or actual workplace) captures what truly happens rather than what historical records or memory suggest.
A check sheet is most useful in the Measure phase for:
Answer: Systematically collecting and tallying defect or event data in real time
A check sheet is a structured form for collecting and organizing data at the source, making tallying and pattern recognition easy.
In a SIPOC diagram, what does the 'O' represent?
Answer: Outputs
In SIPOC (Suppliers, Inputs, Process, Outputs, Customers), 'O' stands for Outputs — the products, services, or information produced by the process.
Which control chart is appropriate for monitoring the average and variation of a continuous measurement when subgroup size is 5?
Answer: X-bar and R chart
The X-bar and R chart monitors subgroup means (X-bar) and subgroup ranges (R) for continuous data with subgroup sizes typically between 2 and 10.
What is the purpose of calculating 'rolled throughput yield' (RTY) in the Measure phase?
Answer: To measure the probability that a unit passes through all process steps without any defects
RTY is the product of first-pass yields at each process step, revealing the true probability a unit is completed defect-free without rework.
When a team notices that measurements drift upward over the course of a shift, this is an example of measurement system:
Answer: Stability (drift) error
Stability (or drift) refers to changes in a measurement system's bias over time, often caused by tool wear, temperature changes, or calibration drift.
Which of the following is NOT a common source of variation that a cause-and-effect (fishbone) diagram would explore in the Measure phase?
Answer: Market (competition)
The standard 6M categories of a fishbone diagram are Man, Machine, Method, Material, Measurement, and Mother Nature (environment) — not Market.