Really great talk by Jamie Finn of Telefonica/O2 at the Campus Party 2012 in Berlin describing his experiences with failing applications and how to turn them into a success. He also describes their use of A.D.S – the Application Definition Statement – to focus and prioritize application features.
… and then fail quickly and often to arrive at the product (application or service) that the users want.
Campus Party 2012 Berlin: Fail Spectacularly