What is/ are (an) advantage(s) when Sales and Operations Planning processing? There is no relationship between SOP process and inventory control when members of the supply chain functions are involved. The level of uncertainty in the supply chain can be reduced when supply chain partners involve. It is easy to satisfy global customers who have higher expectations of quality, service, and cost. Supply chain performance can be improved by improving efficiency. Connecting S&OP (Sales and Operations Planning) with the entire supply chain enhances the supply chain's flexibility to adjust plans according to market changes