Tuesday, December 09, 2008
"TDD makes code development take longer."
Yes, it does. 15-30% longer.

"TDD *may* reduce bug counts..."
Real TDD WILL reduce bug counts. Expect about an order of magnitude. 60-90% comparably.

"I don't want to pay up front for testing or make the code take longer to be feature complete."
That is one choice - but it will be a costly one... Defects will not only be more frequent, but they will probably take longer to fix and be more complex as well.

From a financial perspective, (aside from the customer satisfaction) TDD just makes fiscal sense. I think we would need a compelling reason to give management and shareholders why we are NOT using it.

There is a new video posted on Channel 9 of an interview of one of the Microsoft researchers who contributed to a set of case studies published earlier this year. The case studies were done on 4 teams (3 Microsoft and 1 IBM), and they seem to agree with the statistics and team performance numbers I have been citing for years.

These numbers are motivators for me, and some of the primary reasons I practice TDD, support it, and try to spread the word.

Please take a look at the report and see for yourself if you agree...

TDD
Tuesday, December 09, 2008 12:17:56 PM (Pacific Standard Time, UTC-08:00)  #    Comments [2]  |  Trackback
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