Njengoba sonke sazi, iminyango yomlilo inezinzuzo zokuvala ukushisa, ibambezela ukusabalala komlilo, nokuvimbela intuthu. Uma kwenzeka umlilo, ungakha izimo ezivumayo zokuhlenga abasebenzi, impahla nezakhiwo, futhi unciphise ukulahlekelwa. Kunamabanga amathathu ajwayele ukusetshenziswa ukumelana nomlilo ezicabha zomlilo ezishisayo: Ibanga A (1.5h), iBanga B (1.0h) kanye neBanga C (0.5h).