Engineering BOM Management – Usage > Create and maintain Usage BOM
Split the occurrences of a part based on variant criteria
Split the occurrences of a part based on variant criteria
Considering your business requirement, you can split the occurrences of an element based on variant criteria.
Suppose the Front Exterior Assembly contains a single, generic Headlight Assembly occurrence. However, the bus model is sold in different regions, including North America and Europe, with distinct regulatory requirements for headlights. For example, the headlight requirements are amber turn signals in North America, clear in Europe, and different beam patterns. In this situation, you split the Headlight Assembly occurrence into multiple variant-specific occurrences. Each new occurrence contains a region-specific headlight part.
PrerequisitesYou can split an occurrence based on variant criteria if the variability scope is defined for the element. Procedure Search for the occurrence and click Edit Structure > Split by Variant. The Split panel appears and displays that the element is split into two occurrences and it also displays the variant formula.
Click Split.
Results The two occurrences of the element are created with the same variant condition. You can adjust the variant formula. If you split the occurrences of the element as a part of an active change, the changes, including the creation of the new occurrences and the modifications of the existing occurrences, are tracked. Note After splitting the occurrences of an element, the alignment of designs are retained. However, you must review if the alignments are valid considering your business requirement. Do not use guided or automated updates for adjusting the alignment of these elements.
What to do nextYou must edit the variant condition for the element.
Source: https://docs.sw.siemens.com/documentation/external/PL20251212545240207/en-US/tc_help/ebom_usage/acl1737238842688/rdz5878922937296.html · retrieved 2026-07-11