Many project teams are formed by resources from a number of different groups or organizations. In some cases the organizational boundaries between groups form walls that prevent the team acting as a single integrated entity. The best projects show a close collaboration between those groups.
The basis for collaboration is a common understanding of the project manager’s own role and the roles of others, which also involves understanding each others frame of reference. Team building events are a good binding effort, but they need to be preceded by sharing assumptions, frames of reference and differences in culture.
One of the key factors in getting the right chemistry is to share office space, share expectations and share your goals.