In an earlier version of the software, it was possible to choose between a 2, 3, 5 or 10 point scale. It's a conscious decision to only allow a two point scale, because of the following reasons:
- A binary scale forces the appraisal question to be very specific, and therefore it makes the apprasial more objective.
- It is simpler for the trainee. Often, a question with a two point scale makes it easier to answer the question. You have either done something sufficiently, or not.
- The benefits of allowing multiple scales do not outweigh the added complexity.