| software designer | is a subtopic of 9.1 - The Process of Design |  |
| is a kind of designer | |
| may have to propose that the requirements be changed if new issues raised by design decisions have no solutions | |
| may have to revise previous decisions if new issues raised by design decisions have no solutions | |
| may not propose the same solution to a design issue as another designer | |
| should explore different paths through design space - investigating the consequences of choosing different alternatives when major issues arise | |
| designer | can create skeletons for the files that will contain the code | |
| can learn from studying patterns | |
| can use cost-benefit analysis to choose among alternatives | |
| makes design decision | |
| may also be a programmer | |
| must find ways to reduce costs and increase benefits | |
| should not design large systems until she has experienced a wide variety of software development projects | |
| should study designs of other systems, including designs that have been found to be bad | |
| software developer | asks several evaluators to independently perform heuristic evaluations | |
| can avoid creating design documents before starting to program but this is not a good idea and tends to result in an inflexible and overly-complex system | |
| develops software | |
| has goal rewarding career, recognition, or the challenge of solving difficult problems or by being a well-respected 'guru' in a certain area of expertise | |
| is part of software development team | |
| maintains software | |
| may be judged on when they deliver product, not on its quality level | |
may be reluctant to develop new libraries, APIs and frameworks because- developing anything reusable is seen as not directly benefiting the current customer
- If a developer has painstakingly developed a high-quality reusable component, but management only rewards the efforts of people who create the more visible 'final product', then that developer will be reluctant to spend time on reusable components in the future
- Efforts at creating reusable software are often done in a hurry and without enough attention to quality. People thus lose confidence in the resulting components, and in the concepts of reuse and reusability
| |
| may refuse to reuse components in which they lack confidence | |
| most often works on custom software | |
| must ensure that the set of use cases is complete and that they are expressed consistently and unambiguously | |
| must inform the project manager about any problems | |
| must understand the customer's business environment, their problems and the available technology which can be used to solve the problems | |
| often fails to adequately involve users in the development process | |
| often has significantly less knowledge about modelling than about design and programming | |
| often underestimates software development time because it is very hard for people to assess the quality of software or to appreciate the amount of work involved in its development | |
| performs cost estimation | |
| reuses libraries and APIs delivered with a programming language | |
| should avoid the use of obscure features of technology because later versions of the technology might be changed in ways that are incompatible with how you have used it or the producer of the technology might go out of business or withdraw it from the market | |
| should be rewarded for developing reusable components | |
| should emphasize the use case or use cases which are central to the system, which represent a high risk because of problematic implementation, or which have high political or commercial value | |
| should identify all the use cases associated with the software product | |
| should not document a design only after it is complete | |
| should not omit design documentation | |
| should only reuse technology that others are also reusing | |
| should realize that attention to quality of reusable components is essential so that potential re-users have confidence in them | |
| should realize that developing and reusing reusable components improves reliability, and can foster a sense of confidence | |
| should realize that developing reusable components will normally simplify the resulting design, independently of whether reuse actually occurs | |
| should work for several months on a testing team; this will heighten her awareness of quality problems she should avoid when she returns to designing software | |
| wants software that is easy to design and maintain and which has parts that are easy to reuse | |
| stakeholder | must agree on requirements | |
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