The downside that all those metrics have in common is that they only measure the short-term effects gained with your tests.
Ku tirhisa rin'wana ni rin'wana ra maendlelo lama i swa nkoka ku veka emiehleketweni mhaka ya leswaku mbuyelo lowu u wu kumaka wu ta va ntsena eka ndzinganelo lowu u wu tirhisaka le swi u swi hlayeke EVUTON'WINI BYA WENA.