This task is very broad; it takes all the work that has been planned as part of the project management plan, its subsidiary plans, project baselines, and other documents, and uses them to execute all the project work to deliver the project deliverables with a particular focus on delivering the work within budget and on schedule.
For example: What documents and baselines are contained in the project plan?
For example: What is the main focus of the executing tasks and activities in the project?
Work performance data
For example: During project execution, raw observations and measurements ...