If you're wondering how a big room evaluation day (Step 3 of 4 in lean-agile procurement)  could look like read this awesome interview with Konrad and Dominik about their custom implementation at CSS Insurance called "POCathon". CSS is one of the largest health insurers in Switzerland. For there complex evaluation of a software service provider they've invited 4 providers and put them all together in one room for 3 days. At the end of these 3 days they were able to decide with whom of the service provider they will continue agile delivery at the next day!