Sanitation Standard Operating Procedures
Sanitation Standard Operating Procedures is the common name, in the United States, given to the sanitation procedures in food production plants which are required by the Food Safety and Inspection Service of the USDA and regulated by 9 CFR part 416 in conjunction with 21 CFR part 178.1010. It is considered one of the prerequisite programs of HACCP. SSOPs are generally documented steps that must be followed to ensure adequate cleaning of product contact and non-product surfaces.
Source: Wikipedia — Sanitation Standard Operating Procedures (CC BY-SA 4.0)