For the largest part of my life I have worked in regeneration projects in cities. And all the time I asked myself: what do these projects have in common? What can we learn from them and from each other? Researchers and professors at Universities usually are not the ones that run these projects. Most research information is second hand for them. The project managers that I met – who were themselves responsible for the smallest to the largest project – were almost never the ones to write about them. This could be the reason that there is such a little amount of shared knowledge on successfull projects. And every project manager in a complex project usually feels like they have to start the journey from scratch.