| Design for Reuse |
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| Additions to the requirements |
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| When a system goes into production, it is usual to |
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| reveal
both weaknesses and opportunities for extra |
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| functionality
and enhancement to the user interface |
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| design. |
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| For example, in a data-intensive system
it is almost |
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| certain
that there will be requests for extra reports and |
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| ways
of viewing the data. |
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| Requests for enhancements are often the
sign of a |
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| successful
system. Clients recognize latent |
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| possibilities. |
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| 33 |