What is the name given to the department that develops project management skills, boosts efficiency for projects, and improves project delivery?

Project Management

Explanation:

Project Management is responsible for the success or failure of a project. This department is responsible for planning, executing and closing projects. This essentially means it involves defining the project, building a work plan, and managing the project to the budget. Therefore it covers developing the project management skills, boosts project efficiency and improves the project delivery.