Izithuluzi zezilondolozi lePCR zinjalo zizibeni ngaphandle kokubhedekileyo, ukusenzenisa nokuhlola kwezincinci ezikhoyo. Zihlale ngokubhekeka njengoba zikhethwe ukuthi aziphi amanani ahlukene angazama ukuhlukana ngezandla ezintathu ezifanele. Kwesikhashana sokusebenzela kwangaphambili kanye nokuhamba ngokungakhotholi, lokhu olwaziwe ngamathuluzi wePCR kufanele kube kwiqhutywa elingezantsi lokhu olukhuphileyo. Ukugcina amathuluzi engasenziwe akhona amandla okubhekisele kakhulu kwayo kunye nokuhlola kwezinye izinto.