Removal of Pressure Hold Test and SIP from the routine process

Hello Everyone,
Currently we are performing the CIP, PHT and SIP cycle of the manufacturing vessel before taking Batch. Now we want to remove these cycles Viz. PHT and SIP cycles and before batch manufacturing only CIP Cycle to be performed. Kindly Suggest me how I can do this and what test or analysis or any additional sampling is to be done before doing this…