Dependencies are the relationships between tasks in a project. They indicate which tasks must be completed before or after other tasks, and they help to define the order in which tasks must be performed. Dependencies can also refer to the relationship between a task and an external factor, such as a resource or milestone.
There are four types of dependencies that can exist between tasks: finish-to-start (FS), start-to-start (SS), finish-to-finish (FF) and start-to-finish (SF). In a finish-to-start dependency, one task must be completed before another task can begin. Start-to-start means that both tasks can begin at the same time. Finish-to-finish indicates that both tasks must be completed before either is considered finished. Finally, start-to-finish means that one task must begin before another can end.
Dependencies are important for project managers because they provide structure and clarity to the project timeline. By understanding the dependencies between tasks, project managers can better plan resources and anticipate potential delays. Additionally, dependencies help to ensure that all tasks are completed in the correct order and on time.