The are many forms of a jury. In many judicial processes a jury accompanies judges or the president of a jury in the preparing and voting on the verdict. In sports competitions or arts contests it is also common practice to have a jury of several persons to assist in the decision-making process. In academia we are also used to sit on juries to award Ph.Ds or academic positions or fundings. From famous film festivals (Cannes or Berlin) we know the tricky part to select jury members and supervise the proceedings of the jury to follow the official rules of how to accord prices according to a set of predefined rules. The basic proceedings are very similar irrespective of field of application, academia, film, music. Decision-making of the jury is usually based on some voting procedures, attribution of scores and summarising across jury members (to avoid or minimize the effect of corruption for example). Of course, there is a scientific literature on fallacies to avoid for juries themselves or in the selection of jury members.
The Concours Reine Elisabeth in Brussels 2023 has large jury. This year the enlarged diversity of the jury included the amazing lyric soprano Sumi Jo. The slightly more diverse jury (compared to 2018 song competition) might have contributed to the impressive participation of Asian singers in 2023. In competitions the quality of the jury has already a role in the number of international submissions you are likely to receive. Signalling diversity in the jury, therefore, is an important element of diversity of participants and probably intensifies competition through a broader reach. The winner of 2023 Baryton singer Taehan Kim performs a repertoire of Lieder and Arias in at least double the required 2 (European) languages. The impressive performances in the Demi-final with piano accompaniment and then the Final with the full Orchestra were cheered by the jury (in points) and the audiences as well. The repertoire of Taehan Kim ranges from Beethoven, Donizetti, Poulenc, Schubert, Verdi, Tschaikovsky to Schoenberg in the semi-final and from Wagner, Mahler, Korngold to Verdi in the final performance. Born in 2020, he certainly has a steep career in front of him, in addition to a potentially genetical predisposition as researchers just published in Science Advances 2023.
Praise goes to the accompanying pianist, the orchestra and the jury as well, which has encouraged diversity in applications and throughout the competition. An important training in cross-cultural competence for all performers involved. Rather than having a contest behind a curtain, for performers and/or the jury, the whole competition is an excellent piece of daring far reaching transparency of a jury’s work. Everybody online can still listen to the competition performances and judge (or train judgement) for themselves, because “the jury is still out”. 
