Schedule activity has an estimated cost, duration (start and finish date), and effort (in hours). Using logical relationship, the schedule activities are connected to other schedule activities within a project. Once you identify the logical relationship between the schedule activities, you can use the Gantt chart to create and modify dependencies among the schedule activities. The process of identifying dependencies among the schedule activities is called activity sequencing.
Activity sequencing plays an important role in developing an accurate and realistic project schedule by carefully analyzing the relationship between the schedule activities and their precedence relationships.