CPM Quality Control and Process Optimization 2

Question 1

A plant manager notices a process has a Cpk of 0.85. What does this indicate?

Accepted Answer

The process is not capable and may produce defects

Answer

A Cpk below 1.0 indicates the process is not capable of consistently producing parts within specification limits.

Question 2

Which DMAIC phase involves identifying root causes of defects using tools like fishbone diagrams?

Accepted Answer

Analyze

Answer

The Analyze phase uses tools like fishbone (Ishikawa) diagrams, 5 Whys, and regression analysis to identify root causes.

Question 3

What is the primary purpose of a Gauge R&R study?

Accepted Answer

To evaluate measurement system variation

Answer

Gauge R&R (Repeatability and Reproducibility) quantifies the variation in a measurement system due to the gauge and the operators.

Question 4

In a Pareto analysis of defect types, 80% of defects come from 3 out of 15 defect categories. What should the plant manager do first?

Accepted Answer

Focus improvement resources on the 3 dominant defect categories

Answer

Pareto analysis applies the 80/20 rule, directing resources toward the vital few causes that produce most of the problems.

Question 5

A control chart shows 8 consecutive points on one side of the center line. This is an example of:

Accepted Answer

A special cause signal requiring investigation

Answer

Eight consecutive points on one side of the centerline is a recognized Western Electric rule signaling a special cause that needs investigation.

(CPM) Certified Plant Manager Practice Test