CQIA Root Cause Analysis 4

Question 1

Which of the following best describes the difference between corrective action and preventive action (CAPA)?

Accepted Answer

Corrective action fixes a current nonconformance; preventive action eliminates the risk of a potential nonconformance

Answer

Corrective action addresses an existing problem, while preventive action proactively eliminates potential problems before they occur.

Question 2

A run chart shows a shift of eight consecutive data points all below the centerline. This pattern suggests:

Accepted Answer

A special cause that has shifted the process

Answer

Eight or more consecutive points on one side of the centerline is a standard signal of a special (assignable) cause in the process.

Question 3

What is the role of a 'why-why diagram' in root cause analysis?

Accepted Answer

It visually maps the chain of causes and effects from the symptom to the root cause

Answer

A why-why (or why tree) diagram maps successive cause-and-effect relationships visually, showing the path from symptom to root cause.

Question 4

In RCA, which approach helps confirm that a proposed root cause is genuine by temporarily removing and reintroducing the suspected cause?

Accepted Answer

Cause verification through controlled testing

Answer

Controlled testing — removing and reintroducing the suspected cause — confirms causality by showing that the effect disappears and returns accordingly.

Question 5

An 'Is/Is Not' matrix is MOST useful for:

Accepted Answer

Narrowing down the possible causes by comparing where and when the problem occurs versus where it does not

Answer

The Is/Is Not matrix contrasts conditions where the problem exists with conditions where it does not, helping eliminate unlikely causes.

(CQIA) ASQ Certified Quality Improvement Associate Practice Test

(CQIA) ASQ Certified Quality Improvement Associate Practice Test

CQIA Root Cause Analysis 4