By assigning material components to the operations and phases of the master recipe, you determine which material components must be available at which point in time during the production process.

The component assignments are taken into account for the availability check or material reservation in the order as well as for product costing.

A production version exists for the recipe. The alternative BOM that is assigned to the recipe in this production version has been created in the system.

You can assign material components to both operations and phases. However, we recommend that you only assign material components to phases for the following reasons:

• Material components can only be backflushed if they are assigned to phases.
• Material components that are assigned to an operation are staged at the beginning of its first phase, that is, at the same time as if you assign them directly to the phase.

In the master recipe, you assign material components for each combination of recipe and alternative BOM.

When you create a process order, the assignments of the corresponding alternative BOM are copied from the master recipe to the process order. All material components you have not explicitly assigned to an operation or phase are automatically staged for the first operation. You can still change material assignments in the process order.