When you enter an alternative item group for the item, you can enter the Priority, Strategy, and Usage Probability in a dialog box.

Material requirements planning (MRP) plans the alternative items according to usage probability.

If you use the usage probability to determine the withdrawal posting (strategy 1), the quantities are proposed according to the usage probability. You can change the proposed quantities.

• An alternative item is only planned if the usage probability is at least 1%.
• If the usage probability is 0%, a dependent requirement with quantity 0 is generated for the material.

• It is possible to plan too much for alternative items, because you can enter usage probabilities that add up to more than 100%.

The priority of an item within an alternative item group determines the sequence in which material components are reserved in the production order.

The strategy is only relevant to the withdrawal posting in the production order. The strategy is ignored in MRP.

You use the strategy to determine how the items within an alternative item group are selected for the withdrawal posting. Use the same strategy for all alternative items in an alternative item group.

The following strategies for withdrawal postings are supported:

• Withdrawal according to usage probability (manual changes possible)
• Withdrawal if availability is 100%