A construction schedule is a time-based plan to construct a project. The two most common types of construction schedules are bar chart schedules and CPM (critical path method) schedules. The ideal baseline or as-planned schedule is the earliest complete and approved project schedule. The critical path determines the project’s completion date, and represents the longest continuous sequence of work. This is the sequence of work that must be progressed to avoid delays to the project completion date. A critical path exists on almost every project, and is dynamic and can change throughout the course of the project. Impacts to the critical path can result in a project delay.