Closing a loop in our digital age usually requires a digital solution. Startups or SMEs that are in the process of transforming to circularity, or aiming to do so, are quickly faced with this task. The competencies for digital solutions are often available. But how do we make this solution circular? And how do we convey the circularity of our solution in a potential grant application or pitch to an investor? The answers to these questions are digital. The software solutions to them must be circular. For this, a...