KAIZEN
[noun]
Japanese: continuous improvement; positive change.
Etymology: from Japanese 改善 (kaizen, かいぜん), from Middle Chinese 改善 (kój-dʒjén) (compare Mandarin gǎishàn, 改善), from Old Chinese 改善, “to correct errors”.
Re. someone asked me what a favourite concept of mine was - well here it is.