The most populated country in Southeast Asia, Indonesia became a net importer of oil in 2004 and is estimated to contain more than 4 billion barrels of proven oil reserves, as of 2007. Indonesia's oil sector is controlled by several international oil companies, including supermajor Chevron, which pumps from the countries two largest oil fields, Minas and Duri, along Sumatra's coastline. However, the Southeast Asian country's largest producing oil fields are declining in output as they mature, and the Indonesian government is increasing efforts to curtail shortages in energy supplies, while spurring investments in the upstream sector.
Supply chain management encompasses demand and supply planning, suppliers, inventory, warehouse and logistics management. It covers all processes related to raw materials and associated information from sourcing to end users. There are various certification exams developed for supply chain professionals, namely APIC's certification (Certified Supply Chain Professional or CSCP), ISCEA'S certification (Certified Supply Chain Manager or CSCM), and the CISCM certificate (Chartered Supply Chain Management Professional or CSCMP).