Final answer:
Defining constraints is not required for calculating earned value in MS Project; whereas setting a baseline, entering actual work, and assigning resources are essential.
Step-by-step explanation:
The question deals with the process of calculating earned value in MS Project, a project management software. Defining constraints is NOT a requirement for MS Project to calculate earned value amounts for a project schedule; however, setting a baseline, entering actual work, and assigning resources are necessary steps in this process. Earned value management (EVM) is a project management technique that combines measurements of project performance related to scope, schedule, and cost.