Darmawan, R. and Susetyo, B. (2025) “IMPROVING THE QUALITY OF WORK ON CULVERT UNDERPASS BOX STRUCTURES USING THE LEAN SIX SIGMA METHOD”, Jurnal Pensil : Pendidikan Teknik Sipil, 14(1), pp. 1–19. doi: 10.21009/jpensil.v14i1.45230.