How does the use of outsourcing impact the way in which a project is managed?

When a project or part of a project is outsourced, it can be difficult to manage the project. Things are no longer being done within the work group. Your having to deal with a whole new team that you really have no control over. That outsourced team is given a deadline for their deliverable, and a project manager has to ensure that, that time schedule is maintained, and if the outsourced team fails to meet said deadline then the project mangier would have to assess costs of maintaining that outsourced group, and just how far behind they are. Technically if an outsourced group doesn't get their deliverable in on time then they are fulfilling their contractual obligations, and could mean penalties for said group. But the project mangier has to decide if it is worth letting the outsourced group finish the project they were working on, or getting the work that was done and trying to finish it in house. Also have to consider how critical the project is that the outsourced group is doing if it's an important part of the over all project and the rest of the project can't move forward without that key part. Then the time lines have to be clear and lines of communication open the make sure that the outsourced team if needed can communicate with the team in house.