Due to wide use of web applications, the usability and User Experience (UX) play important roles. The organizations often concentrate less on usability evaluation of web applications due to which the users encounter problems while using the product like page loading time, accessibility, font size etc. The bad usability influences the user experience. Usability evaluation of web application helps the companies to develop more user friendly and accessible products which also improve the market positions of their products. This study is focused on the identification of different definitions of Usability and UX. The relationship between Usability and UX is also investigated. Interviews are conducted in order to identify the factors which restrict the adoption of UEMs. The results of interview are analyzed by using Grounded Theory. Some recommendations are given on the basis of empirical study that how appropriate usability inspection method(s) can be adopted during the product development.