TS Measurement Systems Analysis (MSA) 2

Question 1

In a standard AIAG crossed GR&R study, how many parts, appraisers, and trials are most commonly recommended?

Accepted Answer

10 parts, 3 appraisers, 2 trials

Answer

The AIAG MSA manual recommends 10 parts, 3 appraisers, and 2 trials as the standard design for a crossed GR&R study to provide adequate statistical power.

Question 2

What does the 'Number of Distinct Categories' (NDC) indicate in an MSA study?

Accepted Answer

The number of non-overlapping data groups the measurement system can reliably distinguish

Answer

NDC indicates how many distinct groups of parts the measurement system can differentiate; an NDC of 5 or more is generally required for a capable measurement system.

Question 3

Which advantage does the ANOVA method offer over the range method in a GR&R study?

Accepted Answer

It can separate and quantify the part-by-operator interaction effect

Answer

The ANOVA method produces a part-by-operator interaction term showing whether different operators measure different parts differently — an effect the range method cannot detect.

Question 4

What does the %P/T ratio measure in measurement systems analysis?

Accepted Answer

The ratio of gauge variation to the product tolerance (specification range)

Answer

The %P/T (Precision-to-Tolerance) ratio compares the measurement system's variation to the specification tolerance, indicating whether the gauge is precise enough for the inspection task.

Question 5

'Stability' in measurement systems analysis refers to:

Accepted Answer

The change in bias of a measurement system over time

Answer

Stability (or drift) evaluates whether the measurement system's bias remains constant over an extended period, typically assessed by periodically measuring a master or reference part.

(TS) Test Specialist Certification Practice Test

(TS) Test Specialist Certification Practice Test

TS Measurement Systems Analysis (MSA) 2