What defines a 'predecessor' activity in a project schedule?

A 'predecessor' activity in a project schedule is defined as a task that must finish before another one can start. This relationship establishes a clear sequence for activities in a project, ensuring that dependent tasks are completed in the proper order. For example, if task A needs to be completed before task B can begin, task A is the predecessor to task B.

Understanding predecessors is crucial for effective project planning because it helps project managers identify critical paths and potential bottlenecks. By managing predecessors efficiently, a project manager can streamline workflows, allocate resources appropriately, and avoid delays that could affect overall project timelines. The concept of dependencies in project management is fundamental to creating a realistic and achievable schedule.