Final answer:
The project development team follows the approach of concept selection which involves evaluating design concepts based on constraints and criteria to choose the best one for implementation.
Step-by-step explanation:
The approach the project development team follows is concept selection. After several design concepts have been developed and explored, they evaluate each concept based on constraints and criteria, and choose the best concept to implement the product. This structured decision process ensures that the necessary functionality is revealed, unnecessary features are avoided, and prioritization is assisted.