A usability evaluation model of reddoorz and Oyo Rooms mobile applications based on people at the center of mobile application development (PACMAD)

Abstract

According to reports, approximately 61% of consumers prefer online reading platforms prior to decision making in placing an order. Based on the observations through user reviews on the Play Store and App Store, problems however exist in both RedDoorz and Oyo Rooms, mostly complained by users. This paper hence evaluates the usability of RedDoorz and Oyo Rooms using the people at the center of mobile application development (PACMAD) usability model and the Retrospective Think Aloud technique. The PACMAD model was selected due to the adaptability towards the limitations and problems of the mobile platform. The selected model is combined with Retrospective Think Aloud to measure satisfaction aspects and to provide recommendations for improvement. The stages undertaken in this study consisted of 5 steps. First, problem identification was performed through observation and interviews. Second, data collection was gathered through performance measurement techniques by distributing SEQ (Single Ease Question) questionnaires to determine the level of user satisfaction. Third, NASA-TLX questionnaire distribution to measure aspects of cognitive load. Fourth, Retrospective Think Aloud technique application was implemented to measure satisfaction aspects and provide recommendations for improvement. Fifth, comparative analysis and recommendations were conducted for improvement from measurement results respectively. The obtained results indicated that both applications were considered to be effective, efficient, easy to learn, and easy to understand, as well as to have reasonable error level.