Alter Dependencies

Explanation

This activity is used to create or modify dependencies. Dependency relationships (predecessor - successor) can be created between the operations of a particular work order or between different work orders in the Execution Logic Structure (ELS). Dependencies cannot be created between operations of different work orders in the structure. If a work order does not contain any operations, dependencies cannot be created to this work order.

When creating or modifying dependencies using the Gantt chart, the Dependencies mode must be opened by right-clicking on the graph, and then clicking Create Dependencies Mode. In this mode you’ll see that the cursor becomes a pen, which can be used to draw the dependencies between different nodes in the structure.

You can also create dependencies by using the functionality included in the Predecessors dialog box or by using the List of Values function in the Predecessors and Successors sub tabs.

Prerequisites

• The ELS must have been released, and the work order ELS created.
• Work order operations must have been defined.
• To update the CBS server with dependency information, the site to which the work order or operation is connected must be a CBS enabled site. A site is CBS enabled in Scheduling Basic Data.
• The dependant work order must be in a status lower than Started.

System Effects

• Dependencies are created between two or more operations of a work order.
• Dependencies are created between two or more work orders in the structure.
• If IFS/CBS is used, the addition or removal of both predecessor and successor dependencies for work orders will be recorded in the CBS Server directly if the work order status is Prepared, Released or Started. Note however that immediate rescheduling will not be performed, and you have to reschedule for the new dependency definitions to take effect.

Window

Work Order Execution Logic

Related Window Descriptions

Work Order Execution Logic 
Work Order Execution Logic/Gantt
Work Order Execution Logic/Dependencies/Predecessors
Work Order Execution Logic/Dependencies/Successors
Predecessors - Operation
Predecessors - Work Order

Procedure

• Gantt chart
• Predecessors sub tab
• Successors sub tab
• Predecessors dialog box

Gantt chart

Use this procedure to create dependencies between the operations of a particular work order:

1. Open the Work Order Execution Logic window and query for the desired work order or object ID.
2. Click the Gantt tab.
3. Right-click on the graph, and then click Create Dependencies Mode.
4. Draw dependencies between the operations of the selected work order.
5. Save the information (F12).

Use this procedure to create dependencies between work orders in the structure:

1. Open the Work Order Execution Logic window and query for the desired work order or object ID.
2. Click the Gantt tab.
3. Right-click on the graph, and then click Create Dependencies Mode.
4. Draw dependencies between work orders.
5. Save the information (F12).

Use this procedure to remove existing dependencies between operations or work orders.

1. Open the Work Order Execution Logic window and query for the desired work order or object ID.
2. Click the Gantt tab.
3. Right-click on the dependency line, i.e., the Black arrow, and then click Delete Link.
4. Save the information (F12).

Predecessors sub tab

Use this procedure to define a predecessor for a certain operation:

1. Open the Work Order Execution Logic window and query (F3) for the necessary work order or object ID.
2. In the graphical object structure select the operation for which you want to define a predecessor.
3. Click the Dependencies tab and then click the Predecessors sub tab.
4. Create a new record (F5).
5. In the Predecessor Operation No field, enter the operation that is to be the predecessor. Use the List of Values to select a valid value.
6. Save the information (F12).

Use this procedure to define a predecessor for a certain work order:

1. Open the Work Order Execution Logic window and query (F3) for the necessary work order or object ID.
2. In the graphical object structure select the work order for which you want to define a predecessor.
3. Click the Dependencies tab and then click the Predecessors sub tab.
4. Create a new record (F5).
5. In the Predecessor WO Number field, enter the operation that is to be the predecessor. Use the List of Values to select a valid value.
6. Save the information (F12).

Successors sub tab

Use this procedure to define the successor for a certain operation:

1. Open the Work Order Execution Logic window and query (F3) for the necessary work order or object ID.
2. In the graphical object structure select the operation for which you want to define a successor.
3. Click the Dependencies tab and then click the Successors sub tab.
4. Create a new record (F5).
5. In the Successor Operation No field, enter the operation that is to be the successor. Use the List of Values to select a valid value.
6. Save the information (F12).

Use this procedure to define a successor for a certain work order:

1. Open the Work Order Execution Logic window and query (F3) for the necessary work order or object ID.
2. In the graphical object structure select the work order for which you want to define a successor.
3. Click the Dependencies tab and then click the Successors sub tab.
4. Create a new record (F5).
5. In the Successor WO Number field, enter the operation that is to be the successor. Use the List of Values to select a valid value.
6. Save the information (F12).

Predecessors dialog box

To define dependencies between operations, follow the procedure described in Define Predecessor Relationships.

To define dependencies between work orders, follow the procedure described in Define Predecessor Relationships for Work Orders.