On Fri, Jun 26, 2015 at 10:04 AM, Donald Ziesig <don...@ziesig.org> wrote: > Hi Graeme, > > As mentioned in one of the earlier replies, it really depends on the > complexity of the application and the state of the Business Rules. > > If I have a detailed definition of the Business Rules (a really rare > occurrence), I will start with the BOM and UI. I sometimes build in some > data fixtures without ever touching the database till I am reasonably sure > that the BOM/UI and Fixtures describe the Business Rules. Then I will start > moving the fixtures into the schema one or two at-a-time with constant > testing. > > When I don't have a detailed definition of the rules (the usual case), I > start with top-level rules and one or two top-level tables, their associated > BOMs and UIs. After each set of BOM/UI/Tables I sit down with the customer > and demonstrate what I have so far. We then agree on any changes that must > be made and we iterate till that set of requirements are being satisfied. > Often we also agree on what part of the rules should be implemented next. > > Most of the time, the customer "waves her hands" to describe what the > program must do, so it is up to me to actually start developing the Business > Rules. When that happens, the second approach helps by reducing the amount > of throw-away code required till the customer gives his/her approval. > (Especially when the customers are my own daughter and grand-daughter). > > My most recent project was a translation of a pre-Windows c++ program with a > CLI for the user interface and no database into Lazarus with sqlite3. Since > the rules were well established, just implemented with very old technology, > I used the first approach and it worked very well. I had almost the entire > program working in test mode before I had to touch the database for > production. > > Hope this helps. > > Don Ziesig, ROP (Really OLD Programmer);-)
+1 Marcos Douglas -- _______________________________________________ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
