I used the same methods creating interface mockups through hand drawings.
First, I create as many interfaces and elements for the interfaces as possible based on the given context. I explore every field and simply focus on making more.Afterwards, I review and discuss all interfaces and benefits of each interfaces compared to each other.
Mastering both methods allows me to find the make the best interface for a given problem.
At AUHack I reviewed all interfaces together with Frederik about which one suited our product the best.
We decided that a bar and a numerical value worked in our favor. Unlike a circular graph, A vertical or horizontal bar gives a better sense of progression for the user. Because it grows and fills up empty space. In this way, we reward the user visually. While a circular graph is never growing outside itself but only changing its content.