 The development of a decision support system is determined the types of information and the facilities needed for taking the decision.
 Decision support systems are developed using programming language or produced packages specially in cooperating decision support development tools.
 Conventional high-level languages, such as C++ and BASIC, can be used to develop DSSs. They are extremely flexible. However DSSs using this language involving a lengthy analysis and decision phase.
 Fourth-generation or very high-level languages are more appropriate. They are particularly useful as they are generally data base-oriented.
 This is important for those systems that really on data retrieval and analysis for decision support.
 An example of prominent four generation language is SQL, which can used on many relation database system such as ORCAL.
 The selection of language depends on factors such as:
• Availability of language and support for it.
• Experience of developers with various languages.
• Amount of manipulation vs. presentation of data.
• Need to document and maintain the program.
• Frequency of use and number of users.
 The advantages of using programming languages are that:
• Application development is speedy.
• Many are end-user oriented.
• They are more likely to the decorating rather than procedural.
 There are three methods for developing DSSs.
1. DSS generator
2. DSS shells

 Group decision support systems (GDSS) are computer based information systems that facilitate the free flow and exchange of ideas and information among group members while maintaining their anonymity.
 Other terms have also been coined to describe the application of information technology group setting.
 The terms include Group support system (GSS), Computer supported cooperative work (CSCW), Computerised collaborative work support, Electronic meeting system (EMS).
 Group typically consist of less than 20 people who arrive at decisions through taking process. The decision may be taken vote for often negotiation, consensus or preference ranking.
 There are three types of computer based support are available in GDSS. These are
 Decision networks:
 This type allows participants to communicate though networks with each other or a central
 Applications software is using a local area network and microcomputers. The technology filters out many of the typical group dynamics of a participative meeting.
 Decision room
 Participants are located in one place the decision room.
 The purpose of this to enhance participant interaction and decision making computerized support within a fixed period of time using a facilitator.
 Tele/computer conferencing:
 If groups are composed of members or subgroups that are geographically dispersed, tele/computer conferencing provides for interactive connection between two or more decision rooms. This interaction will involve transmission computerized and audiovisual in information.

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