Loop Analysis 

In Plant Maintenance, it is presumed that the operations connected by relationships within an operation network will be performed one after the other and individual operations will not be repeated. A loop should be avoided as this can cause problems when scheduling the maintenance order in which the maintenance task list is included.

To avoid saving such loops in a maintenance task list, the PM system offers you loop analysis. This is a tool which checks if any loops exists in the operation network. You should always use loop analysis when you have created or changed relationships.

To start loop analysis, perform the following steps:

  1. Call up the maintenance task list in which you want to start the loop analysis by using one of the following menu bar sequences:

    2. Task lists ® For equipment ® Change

    Task lists ® For functional location ® Change

    Task lists ® General task lists ® Change.

  2. Call up the Operation overview of the maintenance task list.
  3. Set the network profile for the graphic, by choosing Settings ® Profile and enter the profile required with the profile group and name in the section General data. Return to the operation overview by using Continue.
  4. Go to the network graphic for relationships by choosing the following option:
    Goto     ® Network graphic.

    5. The system displays the existing relationships in the network graphic.

  5. To start the loop analysis, choose the menu bar sequence Edit ® Functions ® Loop analysis ® Proceed.

    6. The system checks all relationships to see if they form a loop. If it finds a loop, it will highlight the affected relationships and operations.

  6. Select the relationship(s) that produce a loop and choose the menu bar sequence Edit ® Object ® Delete.

To remove the highlighting, choose Reset.
  1. Exit the graphic and save the changes to the maintenance task list.