Reaching temperature is not the same as sterilizing
An autoclave display showing 121°C tells you the chamber reached that temperature -- it doesn't confirm that heat penetrated every item in the load long enough to sterilize it. Validation is the process of proving your specific loads, in your specific autoclave, actually achieve sterility.
The three checks every validation program needs
Physical monitoring (chamber temperature and pressure logs, ideally printed or digitally logged every cycle), chemical indicators (strips or tape that change color at sterilizing conditions, used on every load), and biological indicators (spore ampoules that confirm actual microbial kill, run periodically and after any major load change or repair).
Document every cycle, not just the passes
Auditors typically want to see a complete, dated cycle log -- including any failed or aborted cycles and what corrective action followed. A gap in the log is often treated as seriously as a failed cycle.
Revalidate when anything about the load changes
A validated cycle for loose glassware doesn't automatically cover a new, denser load configuration. Revalidate whenever you change load size, packaging material, or wrap type, and after any service that touches the chamber, door seal, or steam supply.
