Bills of Material

BOMs are used to define the components that make up a finished item. From within the Items form in the Inventory Management module , you can define an Item as belonging to the Item Type – BOM.

Individual components within a BOM and known as BOM Lines. BOM lines can be of four distinct types :

• Item
  Raw materials are typically defined within this type.
• Production
  Sub-assemblies which have their own sub-BOM would be define within this type
• Phantom
  Placeholder lines on a BOM which represent a sub-BOM which you do not want to reveal until the master BOM enters production. Inventory is not affected until the component is actually needed.
• Vendor
  Components which are purchased from a Vendor – a purchase order will be generated by the Master Planning system for these types of line.

Other Key Facts about BOMS:

• BOMs are version controlled via a header record stored in the Bomversion table.
• Before a version of a BOM can be used on a production order it must be approved and active. BOM versions have effective dates attached to them.
• An item cannot have more than one approved BOM version at any one time that span the same or overlapping effective dates OR are for the same quantity.
• A BOM is copied to a production order when it is raised so that it can be edited to use different components or quantities without affecting the master BOM version.

Key Tables

• BOMVersion – BOM version associates item with BOM. One BOM can have several versions.
• BOMTable – BOM headers
• BOM – Individual items on a BOM

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