The reality of manufacturing planning is very different from the one of engineering design. Whereas the former must manage variables of an extrinsic nature (time, cost and quality), the latter manages the form, fit and function of the product, variables of an intrinsic nature. Information coherency between the product definition, the process plan and manufacturing resources must be maintained at all times. Complementary product structures have therefore been proposed as an alternative to the unified multiview product models developed in earlier research. They allow users to create customized product structures which are linked together at the component level and can be managed separately. Ensuring consistency between these structures relies only on managing the links rather than attempting to maintain a unified product model. The Complementary Information Structures paradigm is fully illustrated through the example of an aircraft pylon design, where the step by step development of its manufacturing Bill of Materials is detailed.