Lati igba akọkọ nigbati ibeere alabara, a bẹrẹ sii titẹ sii alaye sinu eto iṣakoso didara ti ile-iṣẹ, pẹlu rira ohun elo aise, iṣapẹrẹ ayẹwo ati idanwo, idanwo alabara, awọn atunṣe alaye alaye, titi iṣelọpọ ibi-nla, esi esi aaye, nipasẹ gbogbo ọja ọja ati iyika iṣelọpọ, lati rii daju didara ọja ti o muna.