System agnostic requirements and "outcome based interaction" talk by Arjan Noordhoek at the the #EventModeling #unconference. Excellent explanation about why design allows solutions to be proposed with the most knowledge available as opposed to #agile and #waterfall.
Saw that talk during a Lightning talk at #dddeu - very interesting. I Think it is a good supplement and extension to impact mapping
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5moWait, agile and waterfall are not opposites representing good vs. evil? 😉