When reading the site of Eindhoven Scale Model Competition during the competition this week-end, but being on vacation in Sout Turkey, I found very interesting pages available to everyone, which is not existing or available or very rough in any of the other international competitions.
I do encourage you to read them, in particular the jugements criteria for the juges, and classes .... It could inspire a 'guidelines for judging flats' in shows, by Kulmbach 2017 ....
The three guides are attached, in English, Dutch and German.
I am currenty translating them in French for our club, and some French clubs quiet poor in such elements, for possible improvements and uniformization. Can UK and USA also have a look and comments.
I remember also in one club in Belgium, where the judge sheet listing the pieces to be judged by participant and category, was requesting to fill in three columns the three best top pièces in decreasing order, appreciated by each juge as being the best, second and third best on which his evaluation would rate the painter (the best of the three). This allowed after to compare if each judge has the same figure or not, explaining possible variations (when more than one or few pièces are registered fo cours? In most other, general cotation, not defendable, simplistic .... or judges discussin together around each candidate (!!! = concerted judgment ..).
http://www.scalemodelchallenge.com/contest/Till now it is one among the best defined (can't guarantee being followed ..) set of written rules seen.