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DECISION SUPPORT SYSTEMODELS.

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DECISION SUPPORT SYSTEM MODELS

1- Behavioural Model.

2- Management Science Model.

3- Operations research Model.

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BEHAVIOURAL MODEL

Focuses on studying and understanding the different

behaviour/trends amongst the variables.

A behavioural model is built by observing the previous b

of an entity or a system; the resulting model can then be

predict future behaviour and performance.

Examples of such a model can be trend analysis, co-rela

regression etc.

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MANAGEMENT SCIENCE MODEL

Based upon the principles of the management, the management a

and the econometrics.

Examples of such a model can include budgetary systems, cost ac

capital budgeting, inventory management etc.

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OPERATIONS RESEARCH MODEL

Based on the different mathematical formulae.

Represent the real life problems depending on the various variab

the parameters expressed in the algebraic equations form.

Examples of such a model can be linear programming, ABC analy

mathematical programming techniques, material requirement pl

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DEVELOPMENT OF DSS

The decision support system is determined by the type of infoand the facilities required for taking decisions .

Decision support systems are developed using programming

languages or produced by packagesspecially incorporating de

support development tools.

Fourth generation level language are appropriate for creating

developing DSS , that is because they are database oriented an

decision making process need data retrieval and analysis.

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SELECTION OF LANGUAGE

Availability of language and support for it .

Experience of developers with various languages.

Amount of manipulation v/s presentation of data.

Need to document and maintain the program .

Frequency of use and number of users

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ADVANTAGES OF USING PROGRAMMINGLANGUAGES

Application development is speedy

Many are end-user orientated

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METHODS OF DEVELOPING DSS

DSS generator

DSS shells

Customer made software

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DSS GENERATOR

Is comprised of programs such as data management tools, elespreadsheets, report generators, statistical packages, Graphica

packages, query languages that help in the development of DS

DSS generators, FOCUS, Excel and Lotus 1-2-3.

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DSS SHELLS

Shells eliminate the need for developing the DBMS, model ma

systemAnd user interface , because skeletal versions of these modules

available in the shell.

Shells have become user friendly, allowing even users with litt

programming background .

The main advantage of shells is that it may have to be customi

meet the needs of the decision make or the user may have to a

problem to the tool.

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CUSTOM MADE SOFTWARE

This is designed and developed by organization.

The software is developed using a procedural language , such as

generation language such as FOCUS.

Organizations may also choose to combine shells and customised