Select the Work with demand plan hierarchies menu item.
On the initial panel, select the hierarchy for which you want to add details and click Details.
You access Work with demand plan hierarchies, Details. On this panel and the subsequent panel you create the hierarchy set that is used for the demand plan by selecting and sequencing the keys that should be used in the hierarchy set. Sequence the keys that are to be used in the hierarchy set using the numbers 1-9 where 1 is the highest level. Each level can only be used once in a set. Click Next to access the second panel where you sequence the customer hierarchy keys. These must have a lower level than the item keys. Click OK. Exit the routine.