These assembly work instructions were developed in one of the experimental workshops together with e.g. operators from the temporary learning and training workshop predating the Volvo Uddevalla plant and thereafter used for full-scale product purpose in the completed assembly plant. They were formalised by an information system used for such purposes. Thus, it is fair to state that these particular assembly work instructions were validated at an industrial scale (they actually represent years and years of work from ours' and others personnel' side).
Specifically, this publication explains how the authors dealt with s the product architecture and product variation of the automotive products disassembled, which proved to necessary to be carried out in one of the experimental workshops (several complete automobiles and one heavy truck chassis were disassembled combined with having product data accessible in form of paper print-outs as well as by appropriate computer connections to the two Volvo companies etc.). That is, by using a special sort of "design analysis by means of axonometric hand-drawn illustrations" (see a conference contribution from 1992 that also is registered and available as o PDF-document at Chalmers Public Library (CPL) (a self-developed method found out together with a junior research competency from the School of Architecture at Chalmers).