Just a couple of brief definitions to those who may not know:
Quality Control "QC" - a process whereby you insure quality by inspecting and testing the products you make.
Quality Assurance "QA" - tightly controlled and constantly measured production processes that are proven to result in a quality part.
Japanese car manufacturers pioneered QA. Its cheap and effective.
The military and NASA still insist on QC. Its expensive and actually less effective than a good QA program, in most cases.
Many people have a hard time grasping the idea that an assembly of parts that has not been inspected can have higher quality than an assembly of parts that is inspected.
When was the last time you heard of someone blowing an engine in a Camry?
Don

