Good decision making and problem solving skills are key to developing effective information and decision support systems. These systems include management information systems (MIS), decision support systems (DSS), group support systems (GSS), and executive support systems (ESS). MIS provides the right information to managers at the right time to support decision making. DSS are used for unstructured problems and can optimize, satisfice, or use heuristics to find solutions. GSS and ESS apply the DSS approach specifically to group and executive decision making.