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What is the difference between quality assurance and
quality control?
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Answer Posted / shresha
•Quality Assurance: A set of activities designed to ensure
that the development and/or maintenance process is adequate
to ensure a system will meet its objectives. •Quality
Control: A set of activities designed to evaluate a
developed work product. •Testing: The process of executing
a system with the intent of finding defects. (Note that
the "process of executing a system" includes test planning
prior to the execution of the test cases.) QA activities
ensure that the process is defined and appropriate.
Methodology and standards development are examples of QA
activities. A QA review would focus on the process elements
of a project - e.g., are requirements being defined at the
proper level of detail.
QC activities focus on finding defects in specific
deliverables - e.g., are the defined requirements the right
requirements
Testing is one example of a QC activity, but there are
others such as inspections
The difference is that QA is process oriented and QC is
product oriented.
Testing therefore is product oriented and thus is in the QC
domain. Testing for quality isn't assuring quality, it's
controlling it.
Quality Assurance makes sure you are doing the right
things, the right way.
Quality Control makes sure the results of what you've done
are what you expected.
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