A decision support system (DSS) is a computer-based information system that supports business or organizational decision-making activities. A DSS focuses specifically on supporting decision-making, while a management information system provides reports and data to managers at different levels of the organization. The main components of a DSS are a database, model base, knowledge base, and user interface, which work together to analyze data and present users with options to help make informed business decisions. For example, a DSS could help a company determine the optimal inventory levels to minimize costs while fulfilling customer demand.