Structured decisions are made from a given set of inputs, such as deciding to issue a reminder notice if a bill is overdue or deciding to tell a stock under a given set of market conditions. They are generally repetitive in nature; therefore they can be fairly easily programmed. However,
unstructured decisions and semi-structured decisions are generally not repetitive in nature. It involves different inputs and is subjective in nature. Thus, normally they are not programmable and need human intervention. Decision Support System (DSS) can help in making those decisions. DSS is an interactive system that provides a user with easy access to decision models and data from a wide range of sources, to support unstructured and semi-structured decision making tasks typically for business purpose.