This assignment involves the application of the cognitive walkthrough methodology to evaluate the usability of a mobile app prototype. The task identifies issues in the bookings and payments functionality, including the absence of an option for users to select the type of event and the lack of a facility to view purchased items before making payment. A suitable approach is selected due to its cost-effectiveness and ability to be implemented at the design stage prior to development. The assignment provides a detailed analysis of the methodology and its application, along with relevant bibliographic references.