Add incompatible part restrictions
Part incompatibility is a restriction that prohibits the installation of a specified part onto an assembly if another part is installed, even though both parts are valid parts. You can create global type or assembly position type part incompatibilities.
Examples of how you use the global and assembly type part incompatibilities: An aircraft could have either Pratt and Whitney or Rolls Royce engines installed, but it can't have one of each. To ensure an aircraft has all the same engines installed, you create global type incompatibility rules. You can use the Assembly position type to ensure that parts on an engine are compatible, while allowing multiple engines installed on an aircraft to have different (alternate) parts installed.