Lean Six Sigma Green Belt Measure Phase and Statistics Questions and Answers

Question 1

A Six Sigma team is analyzing the measurement system for a critical process characteristic.
They conduct a study where multiple operators measure the same set of parts multiple times.
The goal is to determine how much of the observed variation is due to the measurement equipment versus the people using it.
What is this type of study called?

Accepted Answer

Gage Repeatability & Reproducibility (R&R) Study

Answer

Process Capability Analysis (Cp/Cpk)

Answer

Failure Mode and Effects Analysis (FMEA)

Answer

Design of Experiments (DOE)

Question 2

A project team has collected data on the time it takes to process a customer order. The data includes values like 3.45 days, 2.87 days, and 4.12 days. Which type of data has the team collected?

Accepted Answer

Continuous

Answer

Attribute

Answer

Nominal

Answer

Ordinal

Question 3

A process has an Upper Specification Limit (USL) of 65 cm and a Lower Specification Limit (LSL) of 55 cm. A statistical analysis reveals that the process has a Cp of 1.5 and a Cpk of 0.8. What can be concluded about this process?

Accepted Answer

The process is not centered between the specification limits.

Answer

The process is both capable and centered.

Answer

The process variation is too wide for the specification limits.

Answer

The process has a high potential for producing defects due to its spread.

Question 4

Which of the following is an essential component of a robust Data Collection Plan in the Measure Phase?

Accepted Answer

An operational definition of what is being measured.

Answer

A list of potential solutions to the problem.

Answer

The project's final return on investment (ROI) calculation.

Answer

A detailed schedule for the Improve and Control phases.

Question 5

A Green Belt is preparing to collect data to establish a process baseline. To ensure the data is reliable and the measurement system is not introducing excessive variation, what activity should be performed FIRST?

Accepted Answer

Conduct a Measurement System Analysis (MSA).

Answer

Calculate the process sigma level.

Answer

Create a control chart for the process.

Answer

Develop a list of potential root causes.

Question 6

The central tendency of a dataset is being analyzed. The values are: 10, 12, 12, 14, 15, 18, 50. Which measure of central tendency would be MOST affected by the value '50'?

Accepted Answer

Mean

Answer

Median

Answer

Mode

Answer

Range