CAPA Trending & Data Analysis 3

Question 1

A quality team discovers that CAPA cycle time data is right-skewed. Which measure of central tendency best represents the 'typical' cycle time for trending purposes?

Accepted Answer

Median

Answer

The median is resistant to the influence of extreme high values in right-skewed distributions, making it a better representation of typical cycle time.

Question 2

In CAPA trending, a fishbone (Ishikawa) diagram is most useful for which analytical step?

Accepted Answer

Organizing potential root cause categories before data collection

Answer

A fishbone diagram helps teams systematically categorize and brainstorm potential root causes prior to data-driven analysis.

Question 3

Which type of control chart is most appropriate for monitoring the proportion of nonconforming units when the subgroup size varies?

Accepted Answer

p-chart

Answer

The p-chart tracks the proportion of nonconforming units and accommodates varying subgroup sizes, unlike the np-chart which requires constant subgroup size.

Question 4

A CAPA analyst calculates an R-squared value of 0.92 for a regression model predicting defect rate from process speed. How should this be interpreted?

Accepted Answer

92% of the variance in defect rate is explained by process speed

Answer

R-squared indicates the proportion of variance in the dependent variable explained by the independent variable(s) in the regression model.

Question 5

When performing stratified trend analysis on CAPA data, what is the primary benefit of stratification?

Accepted Answer

It uncovers hidden patterns masked when data is combined

Answer

Stratification separates data into meaningful subgroups, revealing patterns or root causes that are invisible when all data is analyzed together.

(CAPA) Corrective and Preventive Action Certified Practice Test

(CAPA) Corrective and Preventive Action Certified Practice Test

CAPA Trending & Data Analysis 3