Hutsanana hwemhepo imhando yepasirese classification standard inoshandiswa mukamuri yakachena.Kazhinji ita yakachena kamuri kuyedzwa uye kugamuchirwa kwakavakirwa pane isina chinhu, static uye ine simba mamiriro.Iko kuenderera mberi kugadzikana kwehutsanana hwemhepo uye kudzora kusvibiswa ndiyo musimboti chiyero chemhando yekamuri yakachena.Chiyero chechikamu chinogona kukamurwa kuita ISO 5(Kirasi A/Kirasi 100), ISO 6(Kirasi B/Kirasi 1000), ISO 7(Kirasi C/Kirasi 10000) uye ISO 8(Kirasi D/Kirasi 100000).
