Example
This flowchart shows an example of a site hierarchy:
![](njf1486468652280.png)
A product manager is in charge of finished goods that are only manufactured at sites A and Y. All other sites produce sub-components. You can create a Site Group "AY", consisting of only sites A and Y.
Site Group "AY" can then be specified as the default site group for the product manager. Then when the product manager opens the Item Availability form, the system automatically defaults the Site Group field to "AY". In effect, this customizes the product manager's view of the system.