Design for sustainable behaviour: feedback interventions to reduce domestic energy consumption

Design for Sustainable Behaviour (DfSB) is an emerging research area concerned with the application of design strategies to influence consumer behaviour during the use phase of a product towards more sustainable action. Current DfSB research has primarily focussed on strategy definition and selection, with little research into formalising a mature design process through which to design these behaviour changing interventions. Furthermore, understanding the actual sustainability and behavioural impact yielded through such investigations is limited in addition to the suitability and transferability of evaluation methods and results having seldom been discussed. This thesis investigated how DfSB models and strategies can be implemented within a structured design process towards a sustainable change in user behaviour. This was achieved by focussing a case study within the UK social housing sector with the aim of reducing domestic energy consumption through behaviour changing intervention, whilst maintaining occupant defined comfort levels. Following an in depth study of physical and behavioural control mechanisms as well as comfort and energy within the research context, a behaviour changing prototype was developed through an augmented user-centred design process, resulting in a physical manifestation of one specific DfSB strategy feedback; a user agentive performance indicator. In order to evaluate this feedback prototype, an evaluation framework was developed, targeted at the three fundamental questions that arise when faced with the evaluation of a DfSB strategy led intervention: (1) Did the produced design solution function for the specified context? (2) Has the user's behaviour changed as a consequence of the design intervention? (3) Is the change in user s behaviour sustainable? Applying these core questions in practice through focus groups and user trials resulted in an evaluation of unparalleled depth. The findings of this thesis illustrate the success of using this augmented design process and tripartite questioning strategy towards the design and evaluation of a DfSB strategy led intervention, building a vital knowledge platform for the formalisation of transferable DfSB theory, design and evaluation methods

Understanding consumer disposal behaviour with food to go packaging in a move to circular, zero waste packaging solutions

It is clear that a shift from the current make-use-dispose mentality of product consumption is required to move to the ideal of a Circular Economy (CE), where the world’s resources are kept in use for as long as possible and their value retained. The idea of waste as a resource within a CE is not new, but the pressure to apply it to the Fast-Moving Consumer Goods (FMCG) packaging industry has been growing in momentum since 2016. Many research studies have focussed on recycling behaviours in the home, but few have looked at consumers behaviour with food to go (FTG) packaging disposed out of the home. This research set out to assess the habit strengths of millennial consumers disposing of FTG packaging out of the home within the UK. The outcome of this research showed that millennial consumers have strong habits (upper quartile) in relation to their FTG packaging disposal routine. However, a significant percentage of participants were placing FTG packaging into incorrect recycling bins, showing there is still confusion amongst consumers about how to dispose of waste out of the home. Understanding of habit strengths at the packaging disposal stage could be one element to help in the design of interventions within packaging or waste system design, developing the responsible consumer behaviours required for a circular, zero waste society to exist