Karatas, FERHAT
I would love to change the world, but they won't give me the source code!
Design Debt
23.01.2007 16:50:21 - Filed under : S.Engineering
Software development is a big investment, requiring a minimum of six figures and often far more. So why do so many companies throw away their investment? Why do they trash existing software and rewrite it from scratch? Why do they retire useful products?

Companies often make these painful decisions because their software has become too expensive to maintain. Over time, changes become more costly. Eventually, the cost is too high: the company has to retire the product or rewrite it.

Most teams don't think in terms of design debt and don't even try to pay back principle. If you have a project with an aggressive deadline, your team has almost certainly taken on design debt. It's already slowing them down, and in order to avoid missing deadlines, they'll take on more debt. The compound interest will eventually kill your investment.
Avoid the temptation to stop work and refactor for several weeks. Even the most disciplined team inadvertently takes on design debt, so eliminating debt needs to be an ongoing activity. Have your team get used to refactoring as part of their daily work.

Design debt is like credit card debt: it's easy, tempting, and leads to ruin if not paid off. Nearly every team can go faster by reducing design debt. Demand continuous design improvement from your teams. Support it by reducing schedule pressure and training your teams in advanced code-quality practices. The extra effort now will safeguard your investment for the future

http://www.jamesshore.com/Articles/Business/
Software%20Profitability%20Newsletter/Design%20Debt.html

Related Terminology : Design debt, successful sofware

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