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 operations of an ELS once it is generated. You
can use the ELO Operation: Predecessors and Successors
dialog box
to add predecessor and successor relationships to an operation in the structure. It
is also possible to move an operation from one ELO node to another or to move an
ungrouped operation into an ELO node. This functionality is described in detail
in the Move Operation within Execution Logic Structure activity.
Once you have finished sequencing the ELS, you need to
run the Plan/Calculate Critical Path option to get the ELOs and
operations 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 operations and ELOs connected to the
maintenance order will be sequenced and dependencies defined.
- Predecessor and successor relationships between operations in the
structure will be defined.
- The planned dates on the operations, ELOs
(including grouping nodes) and the maintenance order will be updated
automatically when sequenced.
- 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/Operations
Procedure
- Open the Maintenance Order
window
and search for the necessary maintenance order.
- Click the
Exec. Logic
tab and then
click the Gantt sub tab.
- To view the entire ELS in the Gantt chart, select
the topmost node in the graphical ELS structure.
- 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.
- Draw dependencies between the operations or
between the ELOs as needed.
- To remove an existing dependency, right-click on
the dependency arrow, and then click Delete Link.
- To move an operation from one ELO to another
or to move an ungrouped operation into an ELO follow the steps described in
the Move Operation within the
Execution Logic Structure activity.
- Click the Exec. Logic Structure sub tab and then click the
Operations sub tab to define predecessor and successors for an
operation.
- Right-click on the record, and then click Predecessors and
Successors. The ELO Operation: Predecessors and Successors
dialog box opens.
- Select the Predecessor check box for the operation that is to
be a predecessor to the selected operation.
- Select the Successor check box for the operation that is to
be a successor to the selected operation.
- Click Apply.
- In the Operation ID field, select a different operation to
work with if necessary.
- Define predecessors and successors for the operation.
- When you have finished defining predecessors and successors for an
operation, click Save and Close.
Once you have finished sequencing the ELS, you need to
run the Plan/Calculate Critical Path option to get the ELOs and
operations placed correctly in time. Use the following steps for this:
- Right-click on the Gantt chart, and then click
Plan/Calculate Critical Path.
- If the planned dates are outside the required date
interval, the Change Required Dates on the Maintenance Order
dialog box opens.
- In the Requested Start field, enter the date
and time the maintenance visit is required to start.
- In the Requested Finish field, enter the
date and time the maintenance visit is required to finish.
- If you wish to reset the entire ELS back to how it was default
generated, but based on the changed dates in the Requested Start and
Requested Finish fields in this dialog box, select the Reset the Execution Logic Structure
check box.
- Click OK.