Testing: Chances and Challenges in an Agile World (most slides in english...)
Update 2009-11-11: Here are some pictures of the event.
The stage for my presentation was very well set by Andy Palmer and Peter Stevens who talked both about Acceptance Test Driven Development and about Agile Development in general.
In the afternoon there were several discussion sessions. Generally people wanted to know what the major changes there are in agile projects concernig testing.
A lot or the participants were very eager to affirm that Agile does not change anything concerning testing. Somehow I got the feeling that there was a fear that Agile is claiming that traditional testing is somehow outdated or superfluous...
In my opinion this is definitely not the case. Solid testing practices and processes are even more important in Agile projects. What changes is the timeline! This however has implications on the amount of work (a lot more test effort aggregated over the whole project) and it is a challenge for tester how to deal with this. But it does definitely not change that testing in all flavors (automated, manual, guerillia ...) is still a must.
If I look at requirements engineering, development and testing as three separate disciplines in software projects, then I would argue, that Testing is actually the discipline that is the least affected by Agile.

One consequence of these ideas however is that developers and testers have to interact intensely and there is no place any more for traditional boundaries between testers and developers! Agile promotes multifunctional teams. This however does not mean that there are no specialized testers any more, but they are part of the same team as the developers and all have the common goal of producing useful software. Games of queen of spades between developers and testers definitely have no place in an Agile project!

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