About Approval Unit Hierarchies
An approval unit hierarchy contains approval units and entities that are part of the review process.
Parent/child relationships between approval unit hierarchy members affect the review process:
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When you promote or reject a parent, its children are promoted or rejected unless they are Approved. The owner for the parent becomes the owner of the children.
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When you approve a parent, its children are approved.
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After all children are promoted to the same owner, the parent is promoted to the owner.
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When the status of all children changes to one status, for example Signed Off, parent status changes to the same status.
You can't change the status of a parent if its children have different owners. If the children are promoted to, submitted to, or signed off by different users, the parent has no owner and only a Service Administrators can change its status.