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Chapter 5. Working with Dependencies and... > What Are Dependencies and When Shoul...

What Are Dependencies and When Should You Use Them?

Dependencies are used to create a logical flow among your tasks across time. There are four types of dependencies: Finish-to-Start (the most common), Start-to-Start, Finish-to-Finish, and Start-to-Finish. These are also known among Project users as links. Links are used to tell Project how tasks are related and the order in which they should occur. In each of these links, there are two tasks: the predecessor and the successor. The predecessor is a task that is driving the successor to do something. The successor task cannot achieve its start or finish until the predecessor task has reached its start or finish first.

Links help Project keep your project tasks in the right order when something causes tasks to slip (start later than scheduled). Let's take a look at each type of dependency.


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