A development framework for value-centred design

HCI's focus has shifted from the system, via the user, to the context of use. All are necessary but not sufficient for effective interactive systems design, which requires a 'fourth' value-centred focus. System-, user- and context-centred HCI must be co?ordinated within a value?centred framework with four main processes: opportunity identification, design, evaluation and iteration. The latter two are separate, since iteration requires skills and knowledge beyond those typically available to evaluators. Value-centred development adds new activities and artifacts to existing development methodologies. Opportunity identification has the goal of stating the intended value for a digital product or service. Value delivery scenarios refocus design on value in the world, as does value impact analysis for evaluation. The co-ordination of existing and new HCI activities within a value-centred framework is outlined using examples from an ongoing design project.