The design literature contains many diagrammatic models that represent the relationship between how designers intend artefacts to be experienced and how they are subsequently experienced by consumers, users and other stakeholders. Despite the prevalence of such models, they remain largely disconnected from each other, both within and across design disciplines, and also disconnected from the models of communication whose basic structure they share. The existing models are therefore difficult to locate and useful conceptual developments are often overlooked. The consequences of this are that unnecessary effort is expended in developing representations that duplicate those that already exist or new models are developed from inappropriate found...