1, Ifenisha ingahlukaniswa ibe yifenisha yasendlini yasendlini, ifenisha yasehhovisi kanye nefenisha yangaphandle ngokusho kwesimo sohlelo lokusebenza.
2, Ifenisha ingahlukaniswa ibe ifenisha yengane kanye nefenisha yabantu abadala ngokusho kwabasebenzisi.
3, Ifenisha ingahlukaniswa ibe yisihlalo, itafula, iKhabhinethi njll ngokusho kwesigaba somkhiqizo.
4, Izindlela zokuhlola kanye namazinga acashuniwe asuka ku-European Standard, okungukuthi BS EN-1728, BS-EN12520, BS-EN12521, BS EN-1730, BS EN-1022, EN-581, EN-1335, EN527.