In your company, all the individual parts for functional locations and pieces of equipment for which no history is required, but where spare parts planning is important, should be represented by using a BOM.
Bills of Materials (BOMs) are used for different purposes.
The use of BOMs depends on the following functional areas of a company:
The engineering and design BOM includes all the elements of the product from an engineering viewpoint and contains the technical data.
The production BOM includes the items relevant to production and assembly conditions. For the assembly, only items relevant to production with process-oriented data are required.
The costing BOM reproduces the product structure and forms the basis for automatic determination of the material usage costs for a product. Items that are not relevant for costing are not included in this BOM.
Instead of a uniform BOM, these areas use their own BOM with area-specific data (such as production) and also only evaluate BOMs with area-specific data. This results in a targeted BOM application, whereby only the area-specific data is made available. Data selection is controlled by using the definition of application.
BOMs in Plant Maintenance
The maintenance BOM differs from other BOMs because it only contains items relevant to PM.
The maintenance BOM has the following important functions:
- Structuring of the object
The structure of an object must be displayed as clearly as possible from a maintenance viewpoint.
- Spare parts planning in an order
If a technical object uses a BOM, you can use this during the planning or maintenance order to plan spare parts.
- Spare parts planning in the task list
Spare parts can be planned in the task list based on a BOM.
The main categories of a maintenance BOM are as follows:
Material BOM
Equipment BOM
BOM for functional location
Using a Material BOM as a Maintenance BOM
Material BOMs are always used in PM if a number of identically constructed objects have to be maintained. The aim is not to create a BOM for each technical object, but to create just one BOM, and then assign this to the relevant technical objects. This avoids the use of redundant BOMs.
A material BOM is a BOM that is first created for a material independently of a technical object.
The procedure for creating a material BOM is as follows:
Create a material.
Create a material BOM for the material.
The BOM must then be assigned to one or more technical objects such as equipment or functional location. You can make the assignment or assignments in the respective master record by using the Structure view. The number of the corresponding material is entered in the Construction Type field.
How to Display a Bill of Material (BOM)
