aPriori currently is limited in its ability to cost assembly machining, due to limitations in detecting geometry that is machined at the assembly level rather than the piece part level. In particular, aPriori currently is unable to detect assembly cuts, holes and other material removal features in CAD assemblies when working with all CAD systems other than ProE/Creo in Direct integration. To support assembly machining cost estimates when working with non-PTC CAD systems, aPriori provides a mechanism for you to manually indicate the presence of common assembly milling operations. (Note that support for manually-defined turning operations on assemblies is not yet provided.) See Virtual Machining for more information.