Analisis sistem lelang elektronik dengan model business process change elektronik (BPC) dalam pengadaan wilayah kerja minyak dan gas bumi di Direktorat Jendral Minyak dan Gas Bumi Kementerian Energi dan Sumber Daya Mineral RI = The Analysis of an electronic system of tender process for oil and gas bidding wit the business process change (BPC) model in Directorate Generale of Oil and Gas, Ministry of Energy and Mineral Resources