often hear the terms quality assurance
and quality control used interchangeably.
However, we like to think of quality control
as an reactive approach to quality: Doing
inspections or taking part measurements, finding an
out of specification part and fixing the process.
Whereas quality assurance is proactive:
Using the information we gather in quality control
with tools such as control charts
to monitor processes and detect changes
before the parts are out of specification. Quality
assurance also incorporates customer complaints, and
corrective actions to understand the root
cause of quality problems and implement preventative