How is decision support system (DSS) different from management information system (MIS) ?

Difference between Management Information System (MIS) and Decision Support System (DSS): Purpose: A Management Information System provides managers with information and support for effective decision-making by providing feedback on daily operations. DSS provides support for problem-solving phases including intelligence, design, choice, implementation, and monitoring. Focus: MIS systems provide managers with a routine flow of data and assist in the general control of the organization. DSS are slightly focused on specific classes of decisions such as routing, querying. Information Structure: MIS provides structured information to end-users at all levels. DSS provides integrated analytical tools, data, and a model base (a collection of mathematical and analytical models) to help decision-makers solve unstructured or semi-structured business problems. Information Requirement: MIS identifies information requirements at different organizational levels. DSS establishes what tools are used to incorporate the decision-making process of an organization. Design Basis: MIS delivers a system based on frozen requirements. The design of DSS is based on an iterative process and keeps changing with user feedback.