USP3 and PIC/S5 checklist more products to generally be finished from the OQ which includes cleansing and leak tests. Decontamination cycle advancement takes place after the completion with the OQ and is particularly mentioned in detail in part 6. Fresh sterile air or nitrogen is circulated just after decontamination. https://tailinscitech.wordpress.com/2026/02/09/vhp-sterilization-solutions-by-tailin-bioengineering-protecting-pharma-and-laboratory-environments/