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myslidesch05 - WHAT Designing the System CONCEPTUAL...

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Figure 5.1 Conceptual and technical designs. WHAT HOW Customers System builders CONCEPTUAL DESIGN TECHNICAL DESIGN function form System designers Designing the System: In this chapter we look at: conceptual design and technical design design styles, techniques, and tools characteristics of good design validating designs documenting the design
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Figure 5.1 Conceptual and technical designs. WHAT HOW Customers System builders CONCEPTUAL DESIGN TECHNICAL DESIGN function form System designers Design is the creative process of transforming the problem into a solution, the description Of a solution is also called a design. We use the requirements specification to define the problem. Our solution may change as it is implemented. Conceptual and technical designs: To transform requirements into a working system, Designers must satisfy both customers and the system builders. Customers understand what the system is to do. System builders must understand how the system is to work. Thus design is a two-part iterative process.
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Figure 5.1 Conceptual and technical designs. WHAT HOW Customers System builders CONCEPTUAL DESIGN TECHNICAL DESIGN function form System designers Conceptual Design: tells the customer exactly what the system will do. Once the customer approves the conceptual design, it is translated into a technical design. Technical design allows the system builders to understand the actual hardware and software Needed to solve the problem. This process is iterative. In figure 5.1, two documents are used to describe the system. Both describe the same system but in different ways depending on the intended audience.
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Figure 5.1 Conceptual and technical designs. WHAT HOW Customers System builders CONCEPTUAL DESIGN TECHNICAL DESIGN function form System designers
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Figure 5.1 Conceptual and technical designs. WHAT HOW Customers System builders CONCEPTUAL DESIGN TECHNICAL DESIGN function form System designers A conceptual design answers questions such as: where will the data come from? what will happen to data from the system? what will the system look like to users? what choices will be offered to users? what is the timing of events? what will the reports and screens look like? This should be done in non-technical terms that the user can understand. Normally. In some cases the customers may be sufficiently knowledgeable that they can understand and Wish to see the technical descriptions. In such cases the two documents can be combined into One. There are usually good reasons for keeping them separate.
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Figure 5.2 Differences in design documentation. CONCEPTUAL DESIGN TECHNICAL DESIGN “The user will be able to route messages to any other user on any other network computer.” Network topology Protocol used Prescribed bps rate . . .
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Figure 5.1 Conceptual and technical designs.
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