IQ / OQ / PQ
Also: Installation, Operational and Performance Qualification
The three qualification stages showing a system is installed correctly (IQ), operates as intended (OQ) and performs consistently in real use (PQ).
IQ, OQ and PQ sit inside a validated lifecycle that starts from requirements and risk, with each test traceable to a requirement.
For software, the strongest evidence is generated from the real system rather than asserted by the vendor.
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