PM's responsibility
Part of the assessment work consist in identifying clearly what are the deliverables, the work packages required to produce them, the time estimates and not the least, the resources assigned to the work. You must have a clear understanding of how your RAM (responsibility assignment matrix) is designed and wether it's satisfying with you.
Next, you must negociate, with your project team, this work assignment. And they must endorse it or raise concerns. The key here is commitment, individual and collective. Your job as a PM is to get your team to aim in the same direction. You must adress concerns and provide solutions. If resource A doesn't believe resource B can provide quality code, you might want to find out if resource B is appropriate for the woork or wether a personal conflict exists between the two. Etc...
Make your team accountable for their deliverables. If they outsmart the end-users, have them participate in the design with the end-users.
You might want to reward ($$) your team on their individual performance but also on the collective performance and outputs. It might create accountability for the end results as well.
