# Empirical software design > 켄트 벡이 Tidy first? A personal exercise in empirical software design에서 제안한 용어. [켄트 벡](https://wiki.g15e.com/pages/Kent%20Beck.txt)이 [Tidy first? A personal exercise in empirical software design](https://wiki.g15e.com/pages/Tidy%20First%20-%20A%20personal%20exercise%20in%20empirical%20software%20design.txt)에서 제안한 용어. > I like the word empirical to describe this style because it seems to clarify the distinction I’m making with [speculative and reactive design timings](https://wiki.g15e.com/pages/When%20to%20design.txt). “Based on, concerned with, or verifiable by observation or experience rather than theory or pure logic.” Sounds about right. --Preface, [Tidy first? A personal exercise in empirical software design](https://wiki.g15e.com/pages/Tidy%20First%20-%20A%20personal%20exercise%20in%20empirical%20software%20design.txt) 경험적 설계의 "경험적"이란 <합리주의>(이론 또는 순수한 논리)와 대비되는 <경험주의>를 뜻하는 것 같다.