“…UML is a modeling technique for specifying, visualizing, constructing, and documenting the artifacts of software systems. 12 Several studies have been carried out which mostly proposed different types of user-centered User Interface (UI) design methodologies, [13][14][15][16] developed intuitive and interactive UIs, 17,18 developed tools to evaluate the system usability, 19 evaluating usability for applications developed in web or mobile platforms, 17,[20][21][22][23][24] investigating the design of application info architecture in e-governance and educational domain. [25][26][27] However, very few studies have been conducted focusing on e-Health, usability, and design techniques to explore how usability varies due to the adoption of different design methodologies.…”