Somebody from our Quality-Management Department performing analysis of the datasets of PROMS-data brought this up which was very interesting to view this topic from his perspective: When seeing PROMs-data in a table view it would be very useful to see why some answers were not provided. I was not sure if this is possible with our current modeling:
As for the questions where explicit missing data ordinals are present, it would be great if we could render these null flavours as part of the frontend only in these special cases. The user would be unaware that altough he gets 5 possible answer-options 2 of them are semantically different things. Like this the archetype would not have additional fields because we would be using already existing ones.