Relationships 

Definition

You can use relationships to link operations for maintenance task lists.

A relationship describes the chronological interdependence between two operations in a task list. A relationship specifies, for example, that one operation can only begin once another operation has been completed, or that an operation can only be completed when another operation is also completed. You can use relationships to make an operation a predecessor or successor of another operation.

Use

You can use relationships to make a maintenance task list comparable with a standard network from the Project System application component. The maintenance task list is therefore used as the basis for planning, description and control of resources (for example, material, personnel, production resources/tools).

For more information about standard networks, see PS - Project System.

The relationship type specifies how the individual operations are connected to each other. There are the following types:

In Plant Maintenance, FS relationships with a time interval of zero are usually used.

FS Relationship

The finish of an operation is connected to the start of the following operation.

For example, the operation "Installation of Equipment" can only start once the operation "Repair of Equipment" has been completed.

SS Relationship

The start of an operation is connected to the start of the following operation.

For example, the operation "Painting Work" can only start once the operation "Assemble Scaffolding" has been completed.

FF Relationship

The end of an operation is connected to the end of the following operation.

For example, the operation "Dismantle Scaffolding" can only start once the operation "Painting Work" has been completed.

SF Relationship

The start of an operation is connected to the end of the following operation.

For example, the operation "Start-up" can only start once the operation "Acceptance" has been completed.