Sure! Or they could design their own picture/badge to glue onto an overall "competency chart" to show their progress and what they've learned. Getting students to creatively depict the critical aspects of knowledge in a pictorial or symbolic form is a great measure for deep comprehension!
In terms of intervention, I think it comes down to what type of intervention is needed. Is the intervention academic, behavioral, or based on an exceptionality? In my mind, the purpose of this structure is not to lock students into a traditional system of credits or seat-time, but that rather the learning is what is most important. It expects students to meet proficiency/competency requirements without a given timeframe, while also giving them flexibility in learning timeframes, honoring the needs of the individual over the collective managerial desires.