Define and Measure Phases Flashcards
7 cards from real Lean Six Sigma Black 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 Define and Measure Phases flashcards as text
A team performs an attribute agreement analysis and finds that appraisers agree with each other 72% of the time but agree with the standard only 60% of the time. What should the team do first?
Answer: Investigate and standardize the appraisal criteria and training
Low agreement with the standard indicates poor accuracy; the team should clarify criteria, retrain appraisers, and rerun the study before collecting process data.
Which metric captures the percentage of time a process produces output without any defects, rework, or scrap on the first attempt?
Answer: First Pass Yield (FPY)
First Pass Yield (FPY) measures the proportion of units that complete the process correctly the first time without any rework.
A project team calculates Rolled Throughput Yield (RTY) for a 4-step process with individual step yields of 95%, 92%, 98%, and 90%. What is the approximate RTY?
Answer: 77.0%
RTY is the product of all step yields: 0.95 × 0.92 × 0.98 × 0.90 ≈ 0.770, showing how hidden rework dramatically reduces true throughput yield.
In a SIPOC diagram, which column directly feeds into the process steps column?
Answer: Inputs
Inputs (materials, information, resources) are what enter each process step and are supplied by the Suppliers column to the left.
A Black Belt selects a sample size for a baseline capability study. The primary driver of minimum sample size is ensuring which of the following?
Answer: Sufficient statistical power to detect meaningful shifts
Sample size must be large enough to provide adequate statistical power to detect the difference or capability level of practical importance.
A value stream map is created in the Measure phase. Which metric represents the ratio of value-added time to total lead time?
Answer: Process cycle efficiency (PCE)
Process Cycle Efficiency (PCE) = Value-Added Time ÷ Total Lead Time, and is used to quantify the proportion of time the process spends adding value.
During the Measure phase, a team uses a check sheet to collect data. What is the primary purpose of a check sheet?
Answer: Systematically collect and tally defect or event data
Check sheets provide a structured, easy-to-use form for recording and tallying data as events occur, ensuring consistent data collection.