In a nutshell, the concept of "stepwise refinement" is to take an object and move it from a general perspective to a precise level of detail. Architects have used such an approach for years, as have engineers building products. But to do so, they realized they cannot simply go from the general to the specific in one felled swoop, but instead, in increments (steps). The number of steps needed to decompose an object into sufficient detail is ultimately based on the inherent nature of the object. To illustrate, for architects designing a building, the typical steps include:
Author: Tim Bryce
“The biggest risk to your company is not being able to change fast enough… Business Rules are the answer.” …Ron Ross I am a great appreciator of Mr. Ross. He has written extensively on the topic of Business Rules, offers excellent training on the subject, and is the keynote speaker at each year’s International Business Rules Forum. I would like to start my own article on Business Rules with an ‘icebreaker’ he used on a seminar I attended. Consider the sport of American Football. Some aspects of the game are very stable, some less so, and some not necessarily stable at all.
Author: David Wright
The short answer: "Because it requires work."
The long answer: People tend to resist gazing into the crystal ball and prefer to react to life as it passes them by. Some people believe planning in today's ever changing world is a waste of time, that you must be more "agile" and accommodate changes as they occur. As anyone who has designed and built anything of substance knows, this is utterly ridiculous. We would not have the many great skyscrapers, bridges, dams, highways, ships, planes, and other sophisticated equipment without the efforts of architects and engineers. Without such planning, our country would look essentially no different than how the pioneers first discovered the continent. Although we must certainly be flexible in our plans, and we will inevitably make some mistakes along the way, little progress would be made if we did not try to plan a course of action and control our destiny.
People often take planning for granted, that someone else will be making plans for us, such as government officials, our corporate management, or even the elders of our families. Consequently we become rather lax about looking into the future. Nor is there any encouragement by anyone to plan our affairs, such as a tax break. Whereas other countries offer incentives to save money for the future, such as Japan, America does not. Therefore, planning is a rather personal activity; we either see the virtue in doing so or we do not.
As a software architect and developer I’ve used Enterprise Architect (EA) from Sparx Systems (www.sparxsystems.com) for a number of years. In that time I’ve spent considerable time and energy trying to get our business analysts to do the same. While I’ve had some success I must admit it’s been an uphill battle. I suspect this is partly because EA is often seen as a technical person’s tool. And that’s not altogether surprising.
So, if you’re a Business Analyst looking for a tool that can help you do your job more effectively then read on.
The latest progression in software development methods is the agile approach. Its growing popularity proves how effective it is. But two extreme—and even dangerous—views have arisen about agile development. One is that you don’t do requirements at all when you’re working on an agile project. The other is that you don’t need good requirements practices.
In truth, agile development processes are based on good practices. Most of them are not new but are being reconfigured, along with good product development, engineering, and project management practices. In my work with agile teams, I’ve noticed a number of key practices
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