Here, more advanced and interactive nonworking prototypes could serve best. These prototypes are made to understand the interactivity and check the sequences of operations involved. These interactive prototypes can be checked with the real users or at least the acting users. $($Acting users could be the team members behaving just like real users and interacting with the interface as the real users would do$.)$ This technique could be more efficiently used when the level of complexity and functionality is closest to the outcome of the development process.