Managing BOMs

The validity period is the time during which the BOM is valid.

This validity period is defined by the following entries in the BOM header and the BOM item:

Valid-from date:

When you create a BOM, this date specifies the point in time from which the BOM header or BOM item is effective.

When you create or change a BOM by entering a change number, the system copies the valid-from date from the change master record.

Valid-to date:

This date marks the end of the validity period for the BOM item and is calculated dynamically by the system.

Hint

The system assigns a default valid-to date of December 31, 9999.

If you change a BOM with a change number that has a valid-from date, the validity period of the previous state of the object ends at 00:00:00 hours on that date.

You can define a valid-from date for an entire BOM and for individual items.

Watch the following video and understand how a group BOM creation could look like.

Item categories have to be defined for every material BOM component.

The item category provides answers to the following questions:

• Is it necessary to enter a material?
• Does the item support quantity-based inventory management?
• Are both plus and minus signs supported?
• Are subitems supported?
• Which screens are selected and what does the screen layout of the item detail screens look like?

Note that you cannot change the item category after you have entered the item. You can only correct an entry for the item category by deleting the item and then creating a new one.

Variable size items can be also selected and can be used to define individual sizes for components depending on the material BOM.

The variable-size item – item category = R offers the following advantages:

To document the product or a component, choose item category D. A prerequisite for documenting a product or component is a document info record. A document info record must exist for the document, which you must maintain in document management.

The document info record contains basic information for integration into the business process, for example, maintaining the processing state and the storage location information in the document info record.

Depending on the document type, you can manage various types of document data (such as technical drawings, photos, or texts). You can use these documents to describe an object comprehensively. You can also display the document on the screen.

Classes inside material BOMs are only be used, if the header material is a configurable one.

With this feature, you can create a preliminary item for which the material assignment hasn't been done for the BOM. You can create the preliminary item only for engineering BOMs. You can later convert the preliminary item to stock or nonstock item and assign a material.

To control special procedures, you can combine various item categories with various indicators.

The item indicators are available on the following tab pages:

• B ( Basic Data)
• S ( Status/Lng Text)

You can set most of the control indicators in the material master. Most of them are not copied to the BOM. You can also make settings for MRP data on the Basic Data tab page for the BOM item that overrides the indicators in the material master record.

You can make the following MRP settings for BOM data on the Basic Data tab page:

• Phantom assembly
• Individual requirements indicator
• Direct production (special procurement key SOBSL 52)
• Long-term planning

To delete the BOM during the next reorganization run, select the Deletioncheckbox in the BOM header.

Deletion at header level removes the entire BOM, whereas deletion at item level removes only the specified item.

If you delete a BOM without history (without a change master record), the deletion is carried out immediately. Once the deletion is carried out, you can create a new BOM for the same material, plant, and where-used list.

If you delete a BOM with history (with a change master record), the system deletes the BOM on the valid-from date of the change master record.

Before deleting a BOM, the system checks for the following:

• Items with object dependencies to check if the change master supports maintenance of dependencies for configurable BOMs.
• Items with operation assignments. If assignments exist, the system displays the relevant message.

With this app, you display and maintain the hierarchical tree structure of a multilevel BOM.

The app allows you to view the BOM header of the multilevel BOM followed by the nested list of components, assemblies, and material.

You can expand the subassemblies in a multilevel hierarchical tree structure. Each level provides a detail of the usage in the production and the parent-child relationship between the subassemblies.

You can use this app to:

• Search for a BOM efficiently by making entries in the key fields.
• View subassemblies of a multilevel BOM displayed in a hierarchical tree structure.
• Create BOMs and alternative BOMs.
• View the engineering change numbers (ECN) associated with the subassemblies.
• Update single or multiple BOM items in the hierarchical tree structure with or without ECN.
• Add single or multiple components to the existing BOM items.
• Delete single or multiple subassemblies in draft status.
• Save your personalized settings by creating variants of the BOM item table view.
• Sort, filter, and freeze columns in the BOM item table view.
• Toggle between multiple alternatives to view the subassemblies.
• Maintain subitems and specify different installation points, subitem quantity, and subitem text.
• Maintain object dependencies for configurable BOMs using the classic application.
• View subassemblies for different BOM usages.

  You're able view BOM for different BOM usages for which material BOM exists for the subassembly. Thus allowing you to view the subassemblies structure difference across various BOM usages.

• View subassemblies for different plants

  You're able to view BOMs for various plants for which material BOM exists for the subassembly. Thus allowing you to view the subassemblies structure difference across various plants.

• Maintain preliminary item category

  You can add a BOM item for which the material has not been created yet to a BOM. You can then convert the preliminary component to a stock or nonstock item and assign a material.

• Maintain groups

  You can group BOM items together so that you can structure the BOM in a more organized fashion without creation of subassembly material.

  Note

  This grouping is only visible inside this app.

Watch the following video and understand how material BOM changes could look like.