Chapter 2 GatherinG requirements Figure 2-7. BXP mobile dashboard (Left: dashboard view; Right: navigation view) The native application has the best performance and highest security. The performance of the application as well as the user experience vary significantly, based on the development framework chosen, along with the native application approach, the overall performance, and security improves. Nonfunctional Requirements Nonfunctional requirements (NFRs)—also known as quality attributes—decide the robustness and long-term success of the DXP. The quality attributes such as scalability, usability, reliability, availability, maintainability, and performance are the key NFRs that help us to define, track, and measure the success metrics of the digital platform. 43