Final answer:
The primary criterion for selecting a project is to evaluate it based on a set of criteria and constraints. By evaluating different projects based on these criteria and ensuring that they meet the constraints, the best design can be selected.
Step-by-step explanation:
The primary criterion for selecting a project is to evaluate it based on a set of criteria and constraints. Criteria are measurable values that can be used to compare different projects and determine which one is better. Constraints, on the other hand, are limitations or conditions that must be satisfied by a project.
For example, in the context of selecting a commuter vehicle design, some criteria could include the amount of pollution and greenhouse gases emitted per mile traveled, the percentage of energy used from renewable sources, the convenience and comfort for the commuter, and the cost to use the vehicle for five years.
By evaluating different projects based on these criteria and ensuring that they meet the constraints, the best design can be selected.