IDK, quite often the PM has to manage external people/teams who need to do stuff in a project but clearly have their own interests (either their employer or pe

IDK, quite often the PM has to manage external people/teams who need to do stuff in a project but clearly have their own interests (either their employer or personal) in mind than the organization who wants to use their services. Purchasing and outsourcing (which are key parts of most non-tiny projects) does require being able to make technical decisions that are best for the project, not the most profitable or easiest for some of the vendors implementing their parts.