Information Technology Reference
In-Depth Information
FIGURE 8.2
The software life cycle.
are available to the team? And at what cost? Do they have the right attributes, such as
completeness, language, and reliability? Will it be difficult to operate and maintain?
What methods will they need to process, store, and deliver the software?
In stage 3, the design team should produce several solutions. It is very important
that they write or draw every idea on paper as it occurs to them. This will help
them remember and describe them more clearly. It also is easier to discuss them
with other people if drawings are available. These first drawings do not have to be
very detailed or accurate. Sketches will suffice and should be made quickly. The
important thing is to record all ideas and develop solutions in the preliminary design
stage (stage 4). The design team may find that they like several solutions. Eventually,
the design team must choose one. Usually, careful comparison with the original
design charter will help them to select the best subject to the constraints of cost,
technology, and skills available. Deciding among the several possible solutions is
not always easy. It helps to summarize the design requirements and solutions and
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