By Michael Guttman
One of many issues of whatever like structure is that it truly is tough to quantify the worth. this is often much more tough while the strategy should be utilized in lots of other ways, in lots of assorted conditions. this is often definitely the case for MDA. maybe the easiest we will be able to do is element to examples of ways it truly is used, the place it has been winning, and what price it has contributed. good, that will resolution these questions for MDA, this publication is for you.
Real-life MDA, because the name indicates, is essentially a booklet of case reviews. each one case has an identical constitution describing the matter being addressed, why an MDA strategy was once selected, the targets, the demanding situations confronted, how MDA used to be used, what tactics and instruments have been used, the implications and advantages, and the client's review of the MDA adventure. yet that is the place the similarity ends. One case convey MDA in an Agile setting, one other highlights MDA and code iteration, one other indicates how MDA is used to create firm structure, one more indicates an MDA method of outsourcing. This illustrates the range of MDA ways, whereas supplying a framework to appreciate and examine the several examples.
I should still after all point out that the publication is straightforward to learn, even with the non-trivial nature of the topic. either Guttman and Parodi are first-class writers who maintain the circulation attention-grabbing and insightful. If you might have proposal MDA sounded sturdy, yet could not articulate the price, now one could. for those who by no means rather received the assumption of MDA, with a bit of luck this booklet will swap your brain. In both case, you will benefit from the learn and study anything within the process.
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Extra info for Real-Life MDA: Solving Business Problems with Model Driven Architecture (The MK/OMG Press)
Sample text
We have a complex process to get an address into the system, checking that it is correct for the postal service, et cetera. What we initially modeled was at too high a level, and after starting user acceptance testing we found situations that had not been foreseen. There were two loops where testers found themselves reentering addresses over and over, to no effect. We reopened that model, retraced the address-capture steps based on the user feedback, to see what was going wrong. Right now, we have one vendor developer and one of my guys working on the problem and how to streamline the process.
Today, that MDA-based software factory might still have a few bottlenecks and shortcomings but at least we can identify and focus our efforts on removing them. To extend the analogy a bit, we can loosely compare Whitney’s achievements in the 1790s to the invention, some 200 years later, of interface definition languages (IDLs) in the software industry. That is, Whitney could show standard interfaces (interchangeable parts or components) and examples of those interfaces (prototypes). He could show how you could in theory make a system (a rifle) if you assembled those parts.
That is, the first few days of modeling were to be followed by some coding, and the last few days of the iteration were to be allocated to having the QA (quality assurance) team test the code destined for the build of that iteration. The team quickly found out that there was too much overhead in the testing process to achieve this goal.