CPP Quality Assurance in Purchasing 2

Question 1

A supplier consistently delivers products with a defect rate of 0.5%. According to Six Sigma principles, what sigma level does this approximate?

Accepted Answer

Four sigma

Answer

A defect rate of approximately 0.5% (5,000 DPMO) corresponds to roughly four sigma performance.

Question 2

Which quality tool is BEST suited for identifying the root cause of a recurring supplier defect?

Accepted Answer

Fishbone (Ishikawa) diagram

Answer

The Ishikawa (fishbone) diagram systematically categorizes potential causes (machines, methods, materials, manpower) to identify root causes.

Question 3

An incoming inspection reveals that 3 out of 150 sampled units are defective. What is the approximate defect rate?

Accepted Answer

2%

Answer

3 defective units out of 150 sampled equals 3/150 = 0.02, or 2%.

Question 4

A purchasing manager wants to verify a supplier's quality management system without conducting a full audit. Which approach is MOST appropriate?

Accepted Answer

Reviewing the supplier's ISO 9001 certification

Answer

ISO 9001 certification from an accredited registrar independently confirms that a supplier's QMS meets international standards.

Question 5

Which contract clause gives a buyer the right to inspect goods at the supplier's facility before shipment?

Accepted Answer

Source inspection clause

Answer

A source inspection clause contractually grants the buyer access to inspect and approve goods at the supplier's location prior to delivery.

(CPP) Certified Purchasing Professional Practice Test