For a long time I have thought that most software solutions are too far removed from the problem they attempt to solve. The simple answer seems to be to identify the use cases and base the system around those. However, normal software development seems to move away from the use cases, so I have created a new development model, called Requirement Orientated Development, or ROD, which aims to make the use case part of the code. A system consists of a number of UseCases. Each UseCase has a number of Actions which can take inputs and give outputs, and can do some processing. A UserInterface (e.g., ServletUserInterface, SwingUserInterface, AtmUserInterface, UnitTestUserInterface) works out the possible Actions at any particular time and gives the user those to choose from. I have not yet dealt with use cases which can loop, and branching is done with duplication, so it is still quite naive, but I aim to make this progress. Am I reinventing old concepts, simplifying matters too much, or have I come across something worth following up? Let me know your thoughts. I'll post some code in another blog post sometime.
Two types of viewpoint
19 hours ago