Manufacturing and Production Quality Control and Assurance

Question 1

What is the difference between quality control (QC) and quality assurance (QA)?

Accepted Answer

QA focuses on process prevention; QC focuses on product inspection

Answer

QA is a process-oriented approach to prevent defects, while QC is product-oriented and involves inspecting outputs.

Question 2

What does SPC stand for in manufacturing quality?

Accepted Answer

Statistical Process Control

Answer

Statistical Process Control uses statistical methods to monitor and control a manufacturing process.

Question 3

A control chart with points outside the upper or lower control limits indicates:

Accepted Answer

Special cause variation requiring investigation

Answer

Points outside control limits signal special cause variation, meaning an assignable, non-random cause exists.

Question 4

What is Cpk used to measure?

Accepted Answer

Process capability relative to specification limits, accounting for centering

Answer

Cpk measures how well a centered process fits within specification limits, with higher values indicating better capability.

Question 5

In quality management, what is a 'specification limit'?

Accepted Answer

The acceptable boundary defined by engineering or the customer

Answer

Specification limits (USL and LSL) define the acceptable range for a product characteristic as required by the customer or design.

Manufacturing and Production Practice Test