Configuring an overlay BOM

An overlay BOM allows users to select multiple saved variant rules to configure the BOM. Teamcenter evaluates the multiple saved variant rules as an OR expression of values from the same option. For example: Copy Saved Variant Rule1: Color=Red AND Engine=V4 Saved Variant Rule2: Color=Blue AND Engine=V6 AND Transmission=Auto If you select these rules to configure the overlay BOM, Teamcenter evaluates the values as: Copy Overlay Variant Rule: (Color=Red OR Color=Blue) AND (Engine=V4 OR Engine=V6) AND Transmission=Auto In an overlay BOM, Teamcenter does not evaluate default values, derived default values, and variant rule checks. Overlay mode requires at least two SVRs to load. Individual SVRs in an overlay configuration may have multiple values for their options. If the BOM is configured in overlay mode, you cannot edit options, option defaults (that is, defaults and derived defaults) and rule checks from the data pane. If you attempt any of these actions, Teamcenter shows the following error message: Copy The selected operation does not support the usage of the BOM Window Variant configuration mode 2 (Overlay). Please change the BOM window variant  configuration mode to 0 (Single rule - single value) or 1 (Single rule- multivalue)

Note Overlay mode is intended to allow configuration based on multiple saved variant rules. Therefore, when the BOM is in overlay mode, the following functionality is not available and results in an error if selected: Reloading of saved variant rules. Editing the variant rule configuration Creating, editing, and deleting of options and values. Creating, editing, and deleting of option defaults. Creating, editing, and deleting of variant rule checks.