The official business definition of an IT project schedule is a document that outlines the timeline, milestones, and deliverables for a project. It is used to ensure that the project is completed on time and within budget. The schedule typically includes a timeline for each task, a list of resources required to complete the project, and a timeline for the entire project. The schedule should also include a list of risks and contingency plans to mitigate them. Additionally, the schedule should include a plan for monitoring progress and tracking changes to the project. By creating a detailed IT project schedule, organizations can ensure that their projects are completed on time and within budget.