Enterprise resource planning, or ERP, is a wide range of activities supported by software with multiple modules (accounting, purchasing, inventory, manufacturing, etc.). Manufacturers and other businesses utilize ERP systems to manage various aspects of their businesses, including product planning, parts purchasing, inventory management, supplier management, customer service management, and order tracking. A relational database system may be a necessary component for the effective use of an ERP system. Implementation of an ERP system can involve considerable business process analysis, user training, and a significant financial investment.