Activity Relationships Related Topics: Entering Activity Relationships Activity relationships define which activities are logical predecessors and successors of each other. Interproject Relationships You can create relationships between activities in different projects. Loop Detection Whenever you enter a relationship between activities, Open Plan automatically checks that a logical loop has not been defined. Link and Unlink Activities You can use the LInk/Unlink Activiteis dialog box to add and remove multiple relationships of the same type between activities conveniently. Redundancy Analysis A redundant link occurs when, in addition to the link in question, there is a more detailed logic link between the same two activities. Parent Topic: Working with Activities