In today’s modern society information technology (IT) is being used more than ever. Computers, smartphones, and other electronic devices where the user interacts with the software creates new demands on the developers. To meet the new requirements, users are invited to participate in the design process to secure high level of usability. Research shows that effective user involvement tends to stop when the system has been implemented, even though most of the requirements can be successfully evaluated after the system have been implemented. The purpose of this study is to examine what factors that contribute to effective user involvement after a system has been implemented and how an interface for the purpose should be designed. The study is conducted in collaboration with a company that is developing a new system for an organization in the public sector. Four semi-structured interviews were executed with a variation of respondents from system administrators to end users. The results show that easily accessible feedback function in the system was a key factor. Furthermore, the author has obtained seven requirements for a successful feedback function. These seven requirements are “Ease of use”, “Constant presence”, “Transparency”, “Frequently asked questions”, “Multimedia annotations”, “Priority list” and “Notices”. These requirements were the basis of the prototype of a feedback function that the author designed for the new system.