The type of the relationship determines how the individual activities are linked with each other.

This is the relationship between the end of an activity to the beginning of the following activity. In the graphic, the "assembly" activity cannot start before the "production" activity has finished.

This is the relationship between the beginning of an activity to the beginning of the following activity. In the figure, the "component procurement" activity cannot start before the "design" activity has started.

This is the relationship between the end of an activity to the end of the following activity. In the figure, the "work scheduling" activity cannot finish before the "design" activity has finished.

Relationship from the beginning of an activity to the end of the following activity. In the figure, the "start-up" activity "start-up" cannot finish before the "inspection" activity has started.