Structure sharing is said to be observed in a product when more than one function is performed by the same structure at the same time and it is claimed to make a product more resource effective. While understood at an intuitive level, however, and although some initial measures are mooted, unless the concepts of structure sharing and resource effectiveness are understood at a more concrete level, their relationships are hard to establish, and harder to instil in a product. Being able to develop measures of, and relationships between, these two concepts should help develop products that are better structure-shared and resource-effective, and hence more innovative yet competitive. This is because structure-shared products are often considered more innovative than non-structure-shared products, and being more resource effective should amount to being simpler and less expensive. The goal of this paper is to develop a method for assessing resource effectiveness and structure sharing in a product, and enhancing resource effectiveness through structure sharing.