It's the dependencies that transform a rag-tag troupe of tasks into a well-mannered project schedule, so Project offers several ways to create and modify all types of task dependencies. This section describes your task dependency options and the pros and cons of each one, starting with the most common type—finish-to-start.
Finish-to-start dependencies are so common that the Link Tasks command on the Standard toolbar is dedicated to creating them. When your tasks follow each other like elephants with one's trunk connecting to the next one's tail, the Link Tasks command is the fastest way to create those finish-to-start dependencies. It's also the easiest way to link two tasks when you can't see both task bars in the Gantt Chart simultaneously.
To create a finish-to-start task dependency, do the following:
Select the predecessor task and the successor task that you want to link.
If the predecessor and successor appear one after the other in the table area of the Gantt chart, simply drag across the two tasks to select both. When you link the tasks, the one higher in the list becomes the predecessor to the one immediately following it.
On the Standard toolbar, click Link Tasks (which looks like links of chain) to create the connection.
Project creates finish-to-start dependencies between the selected tasks. The timescale of the Gantt Chart shows the link lines of these dependencies, as illustrated in the bottom ...