Lean Six Sigma Yellow Belt The Measure Phase 1 Flashcards
6 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 6 Lean Six Sigma Yellow Belt The Measure Phase 1 flashcards as text
Which of the following is an example of continuous data collected during the Measure phase?
Answer: Cycle time measured in seconds for each transaction
Continuous data can take any measurable value within a range (e.g., time, temperature, weight). Cycle time in seconds is measured on a continuous scale. The other options represent discrete (counted) data, which can only take whole-number values.
What does a Cpk value of less than 1.0 indicate about a process?
Answer: The process is not capable and is producing output outside specification limits
Cpk measures how well a process fits within its specification limits while accounting for centering. A Cpk below 1.0 means the process spread extends beyond at least one specification limit, resulting in defective output. A Cpk of 1.33 or higher is the common minimum threshold for a capable process.
Why are operational definitions essential to establish before collecting data in the Measure phase?
Answer: They ensure everyone measures the same thing in the same way, producing consistent data
Operational definitions provide a precise, unambiguous description of what is being measured and exactly how to measure it. Without them, different collectors may interpret and record data differently, making the dataset unreliable and comparisons meaningless.
What is the main purpose of establishing a process baseline during the Measure phase?
Answer: To document current process performance so improvements can be quantified later
A baseline captures the current level of process performance—such as defect rate, cycle time, or sigma level—before any changes are made. It serves as a benchmark so the team can objectively measure how much improvement the Improve phase actually delivered.
In a Gage Repeatability and Reproducibility (Gage R&R) study, what does 'reproducibility' specifically measure?
Answer: The variation that occurs when different operators measure the same part with the same gage
Reproducibility captures operator-to-operator variation—how much results differ when multiple people use the same instrument on the same part. Repeatability, by contrast, captures within-operator variation (one person, same part, multiple trials). Both components together reveal whether the measurement system is trustworthy.
What is the primary reason for organizing data into rational subgroups when constructing a control chart during the Measure phase?
Answer: To group data so within-subgroup variation reflects only common cause, making special cause shifts visible between subgroups
Rational subgroups are formed so that items within each subgroup were produced under essentially the same conditions, meaning within-subgroup variation is attributable only to common (random) causes. Any special cause variation then shows up as unusual differences between subgroups, making the control chart far more sensitive to detecting real process shifts.