Potential sources of conflict between your project team and the various competency leads

  In your team's Course Water Purification Project, what are some potential sources of conflict do you see between your project team and the various competency leads: Engineering, Logistics, Finance, Legal, even the Program Manager herself? How will you deal with those conflicts, up to and including, your Project Team missing some deadlines because other team members missed their deadlines (like Lisa from Engineering being late with the prototype document because Raj got hurt playing football?)