Some components of your grade are individual, some are common to your team section, and others are shared by your entire team. The project workflow illustrates how two team sections combine to make a team.
Individual lab instructors assign grades to students in their lab section. All instructors work in close communication with each other—results after each milestone are discussed to ensure that grading is equitable between sections within a team, and between teams.
Additionally, teams will obtain feedback from several other course staff for each major project milestones. After each milestone, this collective feedback is discussed in lecture since the primary purpose of reviews is to help improve the projects and to facilitate a discussion of what approaches worked well and what can be improved upon.