Last week I travelled to Wuppertal to participate in the community conference NRWConf 2013. With time cockpit we have been sponsors and speakers for this event for years. At NRWConf I did a conference about effort estimation in agile projects. This is the slide deck I used. Sorry for mixing up German and English. I combined two existing talks for this session and by now I couldn't find the time to translate all the slides to German.