The Certified Procurement Operations – Body of Knowledge or CPO-BOK, contains all of the concepts, terms, and activities covered throughout the CPO Suite Programs. We created it with individuals, businesses, and schools in mind. It encompasses all of the critical information required to determine if an individual has the necessary skills and knowledge to succeed as a professional in the supply chain field. This CPO-BOK covers four levels of education that build off each other. The highest level is the CPOE or Certified Procurement Operations Executive. Achieving this certification credential means you completed all four of our certification programs.