Final answer:
After a company transitions to SCRUM, the project coordinator handling facilitation, impediment removal, and team coaching should be called a Scrum Master, aligning with Scrum's unique framework and methodologies.
Step-by-step explanation:
When a company's stakeholders decide to transition the software development team to SCRUM, the project coordinator who facilitates interactions, removes impediments, and acts as the team's coach should be called a Scrum Master. This role is key in the Scrum framework and differs significantly from that of a traditional project manager. A Scrum Master focuses on supporting the team in following the Scrum processes, acts as a servant leader, and ensures a productive and collaborative environment.