Perform Execution Logic Structure Sequencing

Explanation

This activity is used to sequence an execution logic structure (ELS). You can start sequencing and add or remove dependencies to the execution logic orders (ELOs) and task cards of an ELS once it is generated. You can use the Predecessors and Successors dialog box to add predecessor and successor relationships to a task card in the structure. It is also possible to move a task card from one ELO node to another or to move an ungrouped task card into an ELO node. This functionality is described in detail in the online help file Move Task Card within Execution Logic Structure.

Once you have finished sequencing the ELS, you need to run the Plan Execution Logic Structure menu option to get the ELOs and task cards placed correctly in time.

Prerequisites

• A maintenance order in the Under Preparation status must exist.
• An ELS must exist for the maintenance order.

System Effects

• The task cards and ELOs connected to the maintenance order will be sequenced and dependencies defined.
• Predecessor and successor relationships between task cards in the structure will be defined.
• The planned dates on the task cards, ELOs (including grouping nodes) and the maintenance order will be updated automatically when sequenced.
• If demands have been released on the maintenance order, and planning dates are changed or resources added to new ELOs, corresponding resource activities will be generated or updated.
• The sequencing will be transferred to the work order (in IFS/Work Order Management) when the corresponding maintenance order is released.

Window

Maintenance Order

Related Window Descriptions

Maintenance Order
Maintenance Order/Exec. Logic
Maintenance Order/Exec. Logic/Gantt
Maintenance Order/Exec. Logic/Exec. Logic Structure/Task Cards

Procedure

1. Open the Maintenance Order window and search for the necessary maintenance order.
2. Click the Exec. Logic tab and then click the Gantt sub tab.
3. Select the topmost node in the graphical ELS structure.
4. To add or remove dependencies, you must first activate the Dependencies mode. To do this, right-click on the Gantt chart, and then click Create Dependencies Mode.
5. Draw dependencies between the task cards or between the ELOs as needed.
6. To remove an existing dependency, right-click on the dependency arrow, and then click Delete Link.
7. To move a task card from one ELO to another or to move an ungrouped task card into an ELO follow the steps described in the online help file Move Task Card within the Execution Logic Structure.
8. Click the Exec. Logic Structure sub tab and then click the Task Cards sub tab to define predecessor and successors for a task card.
   1. Right-click on the record, and then click Predecessors and Successors. The Predecessors and Successors dialog box opens.
   2. Select the Predecessor check box for the task card that is to be a predecessor to the selected task card.
   3. Select the Successor check box for the task card that is to be a successor to the selected task card.
   4. Click Apply.
   5. In the Task Card ID/Subtask ID field, select a different task card to work with if necessary.
   6. Define predecessors and successors for the task card.
   7. When you have finished defining predecessors and successors for a task card, click Save and Close.

Once you have finished sequencing the ELS, you need to run the Plan Execution Logic Structure menu option to get the ELOs and task cards placed correctly in time. Use the following steps for this:

9. Right-click on the Gantt chart, and then click Plan Execution Logic Structure.
10. If the planned dates are outside the required date interval, the Change Required Dates on the Maintenance Order dialog box opens.
11. In the Earliest Start field, enter the date and time the maintenance visit is required to start.
12. In the Latest Finish field, enter the date and time the maintenance visit is required to finish.
13. If you wish to reset the entire ELS back to how it was default generated, but based on the changed dates in the Earliest Start and Latest Finish fields in this dialog box, select the Reset the Execution Logic Structure check box.
14. Click OK.