Validation
Qualification and validation workflows.
IQ, OQ and PQ explained
Installation, operational and performance qualification ask three questions in order: is it installed as specified, does it operate, does it perform?
What a validation master plan should contain
The VMP is the site-level statement of validation policy, scope, responsibilities and schedule. It shows an inspector how you decide what to validate.
Writing a user requirements specification for temperature-controlled equipment
The URS states what the equipment must do in measurable terms. Every later test traces back to it, so vague requirements produce untestable qualifications.
Design qualification: catching problems before installation
DQ documents that the chosen design meets the URS. It is cheapest place to fix a cold room with a door on the wrong wall.
Requalification and periodic review
Qualified status is not permanent. Change control, periodic review and monitoring data together decide when a system must be requalified.
Qualifying a stability or climatic chamber
Chambers are qualified for temperature and humidity uniformity, stability and recovery — with acceptance criteria tied to the ICH conditions they will run.
How to structure a qualification protocol
A protocol says what will be tested, how, by whom, and what result counts as a pass — all approved before execution begins.
Handling deviations during qualification
A test that fails or cannot be executed as written is a deviation. Record it, assess it, decide, and let the report show the whole story.
Risk-based validation: deciding how much is enough
ICH Q9 and Annex 15 expect the extent of qualification to follow a documented risk assessment: more effort where product quality is at greater risk.
Validating the software that analyses your monitoring and mapping data
Calculations that decide whether a space passed must themselves be verified — with known datasets, expected results and a record of the software version.
Laboratory refrigerator and freezer validation
A 2–8 °C fridge is the most commonly mis-validated item in a laboratory. Calibration, mapping and qualification answer three different questions.