Certified Six Sigma Black Belt Exam Measurement System Analysis 4

Question 1

The AIAG MSA manual recommends that %Tolerance (P/T ratio) be used when the primary concern is:

Accepted Answer

Determining if the gage is adequate to hold the product specification

Answer

The P/T ratio (precision-to-tolerance) compares gage variation to the specification tolerance, making it the right metric when conformance decisions are the focus.

Question 2

A measurement system has a %R&R of 22% and an ndc of 3. Which statement is most accurate?

Accepted Answer

The system is unacceptable primarily because ndc is below 5

Answer

An ndc below 5 means the system cannot distinguish enough categories within the process variation, making it inadequate regardless of %R&R being marginally acceptable.

Question 3

In an MSA study for a vision inspection system, 50 parts (25 good, 25 defective) are presented to 3 operators twice. This study design best evaluates:

Accepted Answer

Attribute agreement analysis (Kappa) for an automated or human visual inspector

Answer

Presenting known-status parts to multiple appraisers in replicated trials is the standard attribute agreement analysis design, evaluated using Kappa statistics.

Question 4

Which of the following is a correct interpretation of 'bias' in a measurement system?

Accepted Answer

The systematic difference between the observed average measurement and the true (reference) value

Answer

Bias is the systematic (consistent) error — the offset between the measurement system's average reading and the accepted reference value.

Question 5

A Six Sigma team discovers that calibration records for a critical measurement device are 6 months overdue. What should be done FIRST before using data collected during that period?

Accepted Answer

Conduct an immediate bias and stability study to assess the magnitude of potential error

Answer

Assessing the current bias and reviewing historical stability data helps quantify the risk before deciding whether prior data is usable or must be discarded.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Measurement System Analysis 4