Thursday, November 1, 2012
A lot of people and organizations, when transitioning from a serial software development lifecycle toward an Agile one, fall into the pattern of mini-waterfalls. They start doing iterations, but each iteration resembles the development lifecycle they already know. The programmers do some design work, then they write the code to implement the design, then unit test the code, and then they pass it to the testers for testing. To many people, this is the only way it can work. Their mental model only admits to this series of phases.
And they run into typical problems. Sometimes the design doesn’t fit the problem well, and patches are needed because there isn’t time to go back to design. The testers get squeezed for time at the end of the iteration, and no one knows how to accommodate the rework when a problem is found. More patches are added, because there isn’t time to redesign. And the next iteration starts the cycle over again.
Sure, doing this in two to four week cycles beats doing it in six to twelve month cycles. But only a little. Most of the time, it starts to fall apart if the team doesn’t learn to work differently.
But it’s inevitable, they say. (Continued)
Friday, February 10, 2012
I’ve just spent more time than I expected getting this to work. It seemed like it would be easy, since running
cucumber from the command line is so easy. But
ant is very helpful in sanitizing the environment for subprocesses–a little too helpful, perhaps. After chasing a number of dead ends and increasingly complicated detours, I ended up with this target: (Continued)
Monday, January 23, 2012
This week, Chris Matts tweeted, “Contemplating whether GIVEN-WHEN-THEN is back to front. The system should do <outcome> WHEN <event> PROVIDED <
stimulus context>… Hmmm.” Let’s try an example. “Given I have $500 in my account, when I withdraw $50 then I have $450 in my account” becomes “The system should show $450 in my account when I withdraw $50 provided I had $500 in my account before.” It doesn’t exactly roll off the tongue, does it? Putting the result first makes the sentence both more complex and more passive. Yet I can understand the impulse that triggered this tweet. (Continued)
Tuesday, June 14, 2011
Also while in Las Vegas for the ADP/West Conference, Bob Payne and I sat in the Agile Philanthropy booth and recorded a podcast on Acceptance Test Driven Development and the 3 Amigos. This is the latest in a series of Tips and Advice podcasts that Bob and I have done.