Which relationship type indicates that one task must begin after its predecessor has finished?

The relationship type that indicates one task must begin after its predecessor has finished is known as Finish-to-Start. This is a fundamental concept in project management as it establishes a clear dependency between tasks. In a Finish-to-Start relationship, the first task (the predecessor) must be completely finished before the subsequent task (the successor) can start. This type of relationship ensures proper sequencing and aids in creating a logical flow within a project timeline.

Understanding this relationship is crucial as it directly impacts scheduling and resource allocation. For instance, if Task A needs to be completed before Task B can commence, the project manager needs to account for the finishing time of Task A when planning Task B. This kind of dependency is one of the most common in project management and helps avoid delays by clearly defining the sequence of operations required for project completion.