Ivalve yetayara licandelo elibaluleke kakhulu kukhuseleko kwaye kuphela ziivalvu ezivela kwimithombo eyaziwayo yomgangatho ocetyiswayo.
Iivalvu ezikumgangatho ophantsi zinokubangela ukuqhawuka kwetayara ngokukhawuleza kwaye izithuthi zingalawuleki kwaye zinokuba nokuntlitheka.Kungenxa yesi sizathu ukuba i-Fortune ithengise kuphela kwiivalvu ezisemgangathweni ze-OE ezine-ISO/TS16949 evunyiweyo.