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This app used the location hierarchy as a Lookup Table as described in Assigning Cases to one of Multiple Groups . Imagine you are an Extension Agent assigned to the Extension Agent level, which has three Administrative Posts under it. When create a case you would see a lookup table question which shows a list of the three Administrative Posts assigned to you. When you choose one and then submit the form that new case is assigned to the post you selected. It is also not necessary to maintain a separate lookup table
The application also captures the names of the locations above it in the hierarchy.
It is very easy to reassign administrative posts; you can just move the location to a different district in the hierarchy, and once the users sync their data the transfer will be complete
One drawback of this approach is that one person can only be assigned to one district; so if there were workers that covered a subset of districts that would need to be another level in the hierarchy