Complex construction projects often exceed budget and time to such an extent that they are deemed failures. What goes wrong and what can be done to secure better coordination and cooperation? Does the answer lie in adopting a more relational mind-set by for instance activating common social norms? Or do the problems and the solutions lie elsewhere? Oliver Hart, David Frydlinger, and others have recently argued for a new way of contracting that indeed involves, among other factors, the activation of social norms. Their perspective will be complemented or perhaps contradicted by the other presenters, who based on their practical experiences will give their accounts of what often goes wrong and what can be done to improve on contract collaboration and conflict resolution.