Functional requirement specification in the packaging development chain

As it is clear that the full packaging life cycle - at least partially - coincides with the product life cycle, both cycles are interwoven. Each has a network of functional requirements, with specific hierarchic propensities. These networks overlap, with prevailing hierarchies playing important roles in combined product/packaging development cycles. This publication describes the role of functional requirements in the complex context of product/packaging life cycles and shows ways to adequately uncover functional requirement specifications besides, or even instead of, technical specifications. A working method is presented, guiding product/packaging development cycles based on structured functional hierarchies. The applicability of the method is shown in a case study.