Conceptual and Technical Designs
To transform requirements into a working system designers must satisfy both customers and the system builders. The customers should understand what the system it to do . at the same time the system builders must understand how to do. To accomplish these design is divided into two parts as shown in fig 5.2, and is called as the two parts iterative process. The two parts are given below:
First the conceptual design is produced that tells the customer exactly what the system will do. It beings to the what part of the solution. Once the customer approves it is translated into a much more detailed document i. e. the technical design which allows system builders to understand the actual hardware and software needed to solve the customers problem. It belongs to the how part of the solution.
The process is iterative because in actuality, the designers move back and forth among activities involving understanding the requirements possible solution testing aspects of a solution for feasibility, presenting possibilities of the customers and documenting the design for the programmers.
As we know system is defined by its boundary entities attributes and relationships. The conceptual design describes each of these system aspects by answering questions such as the following:
The conceptual design describes the system in language that the customer can understand. It may even list acceptable responses and the actions that may result. A good conceptual design should have the following characteristics:
By contrast, the technical design describes the hardware configuration, the software needs. Communication interfaces. The input and output of the system, the software architecture, and anything's else that translates their requirements into a solution to the customer problem. That is the technical design description is a technical picture of the system specification . it usually include at least three items given below:
A description of the major hardware components and their functions,
The hierarchy and function of the software components, and
The data structures and the data flow.
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