Singenza ukuqinisekiswa ngemva kokuhlolwa okuphumelelayo ukuze siqinisekise ukuthi yonke indawo, imishini kanye nendawo yayo kuyahlangabezana nesidingo sakho sangempela kanye nomthethonqubo ofanele. Umsebenzi wokubhala imibhalo yokuqinisekisa kufanele wenziwe okuhlanganisa i-Design Qualification (DQ), i-Installation Qualification (IQ), i-Operation Qualification (OQ) kanye ne-Performance Qualification (PQ).