GPIS 2000 is a Windows based management information system that automates the plant settlement and accounting functions for gas gathering and processing companies. The power of enterprise database management and the flexibility of spreadsheet calculations are combined in GPIS 2000. Powerful data import and export features of GPIS 2000 allow companies to substantially reduce the time and cost of accounting for settlement with producers. Gross margin reports by producer, contract, meter or system, among other reports, provide management with the information to monitor and control plant and contract economics. The relational database and open architecture of the system allows management to easily obtain information about gas flows and the entire allocation and settlement process.