Currently sitting in the RDA FAIR Mappings WG and had the idea that we should be able to automatically calculate a FAIRness score both for individual mappings and a mapping set.
For an individual mapping, this could work by assigning a weight/importance to each field in the Mapping, then taking a weighted sum over all of the fields that are present (then normalizing against the highest possible score).
For a mapping set, it could be a combination of a weighted sum over the mapping set-level metadata fields and the aggregate FAIRness of individual mappings.