USP3 and PIC/S5 list further items being done in the OQ such as cleaning and leak tests. Decontamination cycle advancement takes place following the completion on the OQ and is particularly mentioned in detail in segment six. The design and development of a decontamination cycle typically happens on completion https://tailinscitech.weebly.com/blog/vhp-sterilization-solutions-by-tailin-bioengineering-protecting-pharma-and-laboratory-environments