Decision support systems are interactive information system that assist a decision maker in approaching ill- structured problems by offering analytical models and access to database.the development of these systems arose from dissatification with the rigidity of reporting systems that defined the early MIS environment.DSS has several features to offer in the general information system environment of an organisation .Wedding car hireDSS support decision making in ill structured situations in which precisely owing to the lack of structure,problems do not lend themselves to full computerization,and yet to require computer assistance for access to and processing of volumnious amounts of data.it help to rapidly obtain quantitive results needed to reach a decision.operate in the ad -hoc mode to suit the current needs of the user ,as opposed to perating in a generally sheduled fashion as management reporting systems do.Mdealssupport easy modification of models ,which increase the organisation’s responsiveness to the changing environment both within the and outside an organisation.support various stages of the decision making process,a DSS can help to find a problem.foster high quality decision making by encouraging decision based on the integration of avialable information and human judgement .it offers flexibilityas opposed to a preordained pattern of use making style of an individual .it provide user friendliness ,a principal feature of well designed DSS.Sms solutions Various commercial system support DSS development and package these DSS capabilities in a variety of ways by distributing them among a series of optional modules.DSS can be brodalt used throughout an organisation .these systems can be classified by the management level they offer support to or by the functional area they are used in.they can also be classified into personal and organisational systems .Data access systems can provide user friendly ad-hoc access to the database.this capability to equivalent to what is offerd by most DBMS through a query language .
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however such systems are frequently set up to allow shop floor personnel to continuosly monitor the shop floor or a particular piece of machinery ,thus they fulfill operational control process.Data analysis systems help to analyze historical and current data ,either on demand or periodically.an airline uses a system of this type to comapre its performance with that of its competitors .Forecast -oriented data analysis systems assist in developing product plans,including market segment forecasts ,sales forecast and analysis of cometitive actions .systems based on accounting models are used to consider alternative options for planning purposes,based on accounting defintions and relationships.a system of this type accepts estimates of costs and revenues as input rather than forecasting them. the what if mode of operation is typically employed to compare alternatives.
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Systems based on representatinal models go beyond the use of ready standard formulas such as those employed in systems that rely on accounting models.rather representational models show the dependence between a controllable variable ,such as the price of a product.system based on optimization models are developed by management scientists to determine optimal allocation of resources or best possible schedules ,using the technique of linear programing ,for example one is able to establish the mix of products that must be produced to maximize an objective such as profit ,subject to a variety of constraints .three levels of DSS technology have been identified by Ralph Sprague. A specific dss is the actual system that a managerworks with during the decision process.A specific dss is constructed with the use of dss generators or tools .
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A DSS generator is a software package that provides capabilities for buiding specific DSS rapidly and easily.Capabilities of generators vary widely.
