Imyenda idashongeshejwe ikozwe mu buryo bwihariye kuri ISO 4 n’ibyumba bisukuye, kandi birakwiriye ahantu habi nko mu byumba bisukuye, ibikoresho by’ubuvuzi cyangwa inganda zikoresha ikoranabuhanga.Imiterere yihariye yubuso ifite uburyo bwiza bwo kwinjizwa neza, kandi irakwiriye cyane mu nganda zisaba imirimo yingenzi nka farumasi, ikoranabuhanga rikomeye, ibinyabuzima n’ibikoresho byubuvuzi.