Using Design Strategy Matrix based on Cognitive Usability Model for Mobile Devices in New Product Development

The mobile devices have grown rapidly with the progresses of Information Technology (IT) over past decades. As this reason, mobile devices have become the personal equipments(e.g. iPhone, iPad, Tablet PC and smart-phone). The designs for those devices can be traced to the original design-works of Personal Digital Assistant (PDA), which conceptual design integrated the critical issues with personal computer (PC) and mobility. Personal Digital Assistant (PDA) is a creative and original production for Internet Information Appliance (IA), so the study wishes to explore design issues (which are most important and critical factors for the developers) in the New Product Development (NPD). Therefore, the study uses the Extension of Technology Acceptance Model (TAM) to extend a model called Cognitive Usability Model (CUM) to construct Design Strategy Matrix (DSM) for the decision-making among a lot of design factors, so the developers can use the indicators (e.g. real-time, integration & convenience) into DSM to reduce the complex design-combination based on those factors and to evaluate the capability and acceptance for the users. The study uses the cases of the digital devices designs – “Mobile Addresses Book” and demonstrates the evaluation of the usability factors during the processes of design works. Keywords—Technology Acceptance Model(TAM), Cognitive Usability Model(CUM), Personal Digital Assistant(PDA), New Product Development (NPD) , Design Strategy Matrix (DSM)