Detailed System Design

Detailed System Design

As we already know the concept is a sketch of the structure and/or skeleton of the Information System, it guides the detailed design hence adding flesh to make it move towards becoming the system. As the scope and general configuration of the Information System have been established, the detailed design of the system may be started.

Sometimes it is impractical to explain each and every steps of doing procedure for detailed design for the following reasons.

1. There is a wide variety of approaches to system design in terms of organizing, conducting and defining it.
2. Systems design is a complex of concurrent activities where as the nature of description can proceed along only one line.

The first step in systems design is not a technical one. It is concerned with gaining support for the work that follows. Systems designers must have the support of most members of the organization to obtain information for the design of the system and to obtain acceptance of the final system.

Therefore, at least members of the organization should be informed of the objectives and nature of the study. It is preferable to draw many members into the study.

Aim of the detailed design

The detailed design of an Information System is closely related to the design of operating systems.

The aim of the detailed design is to furnish a description of a system that achieves the goal of the conceptual system design requirements.

This description consists of drawings, flowcharts, equipment and personnel specifications, procedures, support tasks, specification of information files, and organization and operating manuals required to run the system.

Conceptual design gives the overall performance specifications for the Information System; the detailed design yields the construction and operating specifications.

Document the detailed design

The end of the detailed design project is production of the documents that specify the system, its operation, and its design justification.

Documentation Consists of
1. A summary
2. Detailed flowchart
3. Operations activity sheets showing inputs, outputs and transfer functions.
4. Specification of the data base or master file.
5. Computer hardware requirements.
6. Software (programs)
7. Personnel requirements by type of skill or discipline.
8. Final (updated) performance specifications.
9. Cost of installation and implementation of the system.
10. Cost of operating the system per unit of time.
11. Program for modification or termination of the system.


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