Interactive system

Sustainability and Green ICT are concepts that are usually not engineered into the design and development of ICT systems especially in the developing countries. This paper focuses on an interactive system, the Automated Teller Machine (ATM) in Nigeria. Current research concerning ATMs does not consider sustainability and green requirements in the design loop such as how green awareness in design can help support, for example, the reduction of energy consumption and paper wastage while reducing the environmental impact resulting from human computer interaction. This paper considers the specific case of senior citizens accompanied with the general problems of adoption, and mastering of the ATM technology, while highlighting the interplay between usability, green aspects and sustainability of interactive services. The case study was carried out over a period of two months, using observations, interviews and time experiments to support the findings. Key findings include: (1) poor ATM design affects usability and sustainability due to paper wastage as the consequence of redundant menu, (2) energy wastage is the consequence of multiple iterations during withdrawals, visibility of the status of systems, menu labels, and inconsistency and, (3) poor feedback, learnability and memorability, efficiency as well as aesthetics and user satisfaction resulted in a quest for a better ATM design in Nigeria.