Disable Stages or Participants
If a stage or participant doesn't apply based on your business requirements, you can disable it.
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            In the Setup and Maintenance work area, go to the Manage Task Configurations task in the Application Extensions functional area. Or, depending on your offering, you might use a different functional area or another approval setup task. 
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            In BPM Worklist, on the Task Configuration tab, search for the workflow task in the Tasks to be configured pane. 
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            Select the task from the search results and click the Edit task icon in the toolbar. 
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            Click the Assignees subtab. 
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            If the diagram mapping out the workflow task is big, click the Switch to Vertical Layout link. 
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            In the diagram, select the stage or participant you want to disable. - 
                  Stage: Click anywhere in the stage except inside the boxes representing participants. 
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                  Participant: Click in the box representing the participant. 
 
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            In the pane after the diagram, click the Advanced subtab. 
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            Select the Ignore Stage or Ignore Participant check box, depending on what you selected in the diagram. 
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            In the Tasks to be configured toolbar, click the Commit task icon when you're ready to roll out your changes.