Performance Qualification for Drying oven

Hi, I have a school project that I need some clarification for, as a way to reconfirm my research points. What’re some of the critical parameters required for testing for a drying oven to verify performance qualification? And does anyone have a link or information regarding a format on a drying oven?

Some additional information that may helps:
The purpose of the oven is to decrease the moisture content of 80kg of granules X from 5 wt% of water to 2 wt%. A maximum of 100 kg of granules can be loaded in the oven.