SPC Measurement System Analysis (MSA) 2

Question 1

In a 'crossed' Gauge R&R study design, what is the key characteristic?

Accepted Answer

Every operator measures every part multiple times

Answer

Each operator measures only one unique set of parts

Answer

Parts are nested within operators so each operator measures different parts

Answer

Only one operator measures all parts

Question 2

When is a 'nested' Gauge R&R design typically used instead of a crossed design?

Accepted Answer

When the measurement process is destructive and parts cannot be re-measured

Answer

When there are more than five operators in the study

Answer

When the gauge is automated and requires no operator

Answer

When all parts come from the same production lot

Question 3

In a Gauge R&R ANOVA output, what does '%Contribution' represent?

Accepted Answer

The percentage of total observed variation attributable to each source (gauge, operators, parts)

Answer

The percentage of parts that are out of tolerance

Answer

The percentage of the specification tolerance consumed by the gauge

Answer

The percentage of operators who passed the study

Question 4

What is the 'Number of Distinct Categories' (ndc) metric used for in a Gauge R&R study?

Accepted Answer

To indicate how many statistically distinct groups the measurement system can differentiate within the process variation

Answer

To count how many different gauges were used in the study

Answer

To determine the number of operators needed for a valid study

Answer

To count the number of defect categories the gauge can detect

Question 5

What advantage does the ANOVA method provide over the Average and Range (X-bar & R) method in Gauge R&R analysis?

Accepted Answer

It can separate the operator-by-part interaction as a distinct source of variation

Answer

It requires fewer parts and operators to run

Answer

It automatically calibrates the measurement instrument

Answer

It eliminates the need for a reference standard

Question 6

Attribute Agreement Analysis (AAA) is used when the measurement outcome is:

Accepted Answer

A pass/fail or categorical classification rather than a numeric value

Answer

A continuous variable measured on a calibrated scale

Answer

A value derived from a regression equation

Answer

A ratio of two continuous measurements

Question 7

In Attribute Agreement Analysis, 'Kappa' statistic values close to 1.0 indicate:

Accepted Answer

Strong agreement between appraisers beyond what would be expected by chance

Answer

Poor agreement between appraisers beyond chance

Answer

The measurement system is biased toward accepting bad parts

Answer

The number of parts inspected is insufficient