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PowerBuilder® 9: Internet and Distributed Application Development by John D. Olson, Bill Green

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Logical Analysis and Design

Before you can start with development, you need a physical model of the system that you want to create. And before you can develop a physical model, you need a logical model. Are these steps absolutely required to develop a system? Speaking from experience, I have to say “No.” I have found more systems that have been successfully developed and deployed without any analysis and design, or with limited analysis and design behind them. To clarify, I do say “successfully designed,” but after digging behind the scenes, I found that the systems developed without analysis and design often did not meet the users requirements or exceeded the original budget because developers work many more hours than they should to get the ...

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