Alternative materials in BOMs

	Alternative materials in BOMs Some items are interchangeable even when these are purchased from various vendors. You can use any of these items as material in a bill of material (BOM). If a shortage of a standard material is expected to delay a production order, LN can automatically select one of the alternative materials. You can define up to nine alternative materials for any material in a BOM. The use of alternative materials has the following advantages: LN can handle material shortages for some items without user intervention. The use of alternative items can reduce the average inventory level. Note If multisite functionality is active, standard and alterative materials are managed for a specific planning cluster. Alternative materials apply for production orders only, not for subcontracted purchase order. You must distinguish the alternative materials, described in this topic, from the alternative items that you define in the Alternative Items (tcibd0505m000) session. The cost-price calculation does not take alternative materials and use up into consideration. Calculations are done based on the cost of the material specified in the BOM. Restrictions Use-up materials and alternative materials have the same net quantity as the standard material. Use-up materials and alternative materials have exactly the same values of characteristics such as the scrap and yield as the standard material. Use-up materials and alternative materials have the same material-routing relationships as the standard item. If a component on a BOM line is a standard item, that is, an item with an empty project segment, the associated use-up and alternative materials must also be standard components. If a component on a BOM line is a project item, that is, an item with a filled project segment, the associated use-up and alternative materials' project segments must be either: Filled with the same project as the main item's project segment. Empty (the alternative is a standard item) If a component on a BOM line is a phantom, you cannot define a use-up material or alternative material for that component. Priority of an alternative material You can specify the priority of each alternative material. If the standard material is out of stock, LN first tries the highest-priority alternative. If that material is also unavailable, LN tries the alternative that has the next priority. To distribute a material requirement over multiple items If, on a BOM line in the Bill of Material (tibom1110m000) session, the Allow Multiple Items check box is selected, LN can split a material requirement over multiple alternative materials or partly fulfilled by the materials. Example: If ten pieces are needed and only six pieces of the requested material are available, first the six pieces of the original are used then four pieces of the alternative to fill the full quota. Checks for alternative materials At one or more of the following points in a production order's life cycle, depending on parameter settings, LN can check whether an alternative material must be used: When you generate planned production orders in Enterprise Planning. When a production order is created in Job Shop Control. When you run the Generate Alternatives for Estimated Materials (ticst0216m000) session for existing production orders. When you generate an outbound advice in Warehousing. For more details, refer to the Searching for alternative and use-up materials topic. Related topics To define alternative materials Searching for alternative and use-up materials Use-up materials and alternative materials in Enterprise Planning Using up remaining stock of outdated items Defining alternative and replacement items Use up and alternative materials and customized items Defining alternative and replacement items Generating Manufacturing item data by site