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Engineering BOM Management ─ Deployment and Administration

Configure the child items in a structure with the parent variant conditions

You can configure whether a child item should be included or excluded from the structure using the variant condition of the parent item, without applying a variant rule.

To do this, specify a valid value in the PSM_nested_variant_solve_product_types preference. In a nested structure with multiple parent items, the variant condition of the topmost parent item takes precedence in determining the inclusion of child items.

  • None: If this value is set in the preference, the child items are not configured in a structure using the variant condition of the parent items of no topmost item type.
  • All: If this value is set in the preference, the child items are configured in a structure using the variant condition of the parent items for topmost item of all types.
  • Enter a value of an item type for which you want the nested variant configuration to be available. The default value is set to Fnd0AbsDgnProd.

For example, suppose that the variant formula for a fuel tank assembly is set as weight equal to V. In such a case, all the child items of the fuel tank assembly whose variant formula does not contain weight equal to V are automatically excluded from the structure.

Additionally, you can configure whether a child item should be included or excluded from the structure using both the variant condition of the parent items and the variant rules. To do this, specify a valid value in both the PSM_nested_variant_solve_product_types preference and PSM_enable_nested_variant_solve_on_apply_svr_only preference.

The following are the valid values for the PSM_enable_nested_variant_solve_on_apply_svr_only preference:

  • false: This is the default value. If this value is set to the preference, the nested variant is configured with or without a variant rule applied on the structure.
  • true: If this value is set to the preference, the child items are configured in a structure only if a variant rule is applied on the structure.

You can also view the variability conditions for all items in a structure in the Net Variability field. The Net Variability field shows the variant conditions for a child item by adding the variant condition of the parent items in a nested structure.

Source: https://docs.sw.siemens.com/en-US/doc/282219420/PL20251212545240207.ebom_admin/xid2304954 · retrieved 2026-07-11