Multiple supply means that an item has more than one alternative supply source (more than one warehouse or supplier).
For multiple supply from several suppliers, the purchase agreement indicates the percentage of the total quantity desired per supplier. When planned purchase orders are automatically generated, this percentage is then used in the calculation.
For multiple supply from several warehouses, the distribution network indicates which alternative distribution relations are available per warehouse. When planned orders are automatically generated, a check is then made in the distribution calendar to see which supplying source applies for the current order.