CMS Quality Control & Assurance 2

Question 1

Which statistical tool is used to separate the vital few causes of defects from the trivial many?

Accepted Answer

Pareto chart

Answer

A Pareto chart applies the 80/20 rule to rank defect causes so teams focus on the vital few that drive most problems.

Question 2

A process capability index (Cpk) of 1.33 indicates that the process is:

Accepted Answer

Capable with a 4-sigma margin from the nearest specification limit

Answer

Cpk = 1.33 corresponds to a 4-sigma separation from the nearest spec limit, which is the traditional minimum acceptable capability.

Question 3

What does a C-chart monitor in statistical process control?

Accepted Answer

The count of defects on a single unit of fixed size

Answer

A C-chart tracks the number of defects (nonconformities) per inspection unit when the sample size is constant.

Question 4

During a measurement system analysis (MSA), 'reproducibility' refers to:

Accepted Answer

Variation when different operators measure the same part

Answer

Reproducibility is the variation in measurements taken by different appraisers using the same gauge on the same parts.

Question 5

Which quality cost category includes scrap, rework, and warranty repairs?

Accepted Answer

Internal and external failure costs

Answer

Scrap and rework are internal failure costs; warranty repairs are external failure costs — both fall under the failure cost category.

(CMS) Certified Manufacturing Specialist Practice Test