This report presents various usability heuristics pertaining ecommerce and how they impact Return on Investment. Due to evolution of technology and emergence of Directory as a Service, there is a need to understand how this affects usability and human interaction. Usability is seen to have an impact Return on Investment ROI as it determines customer satisfaction. From report findings, it was concluded that human computer interaction and usability were the reason behind the failure of Yeemi ecommerce to prosper in the face of technology evolution in ecommerce. Various design issues were addressed that will ensure that sales are increased and increased customers to Yeemi.