Yenzelwe ukhuseleko oluphezulu lwemithwalo ebuthathaka kwiimeko zemozulu ezimbi kakhulu. Ilungele izixhobo ze-elektroniki, amayeza, izixhobo zomkhosi, kunye neempahla ezixabisa kakhulu ezifuna ukhuseleko oluphezulu lokufuma kunye nomoya ngexesha lokuthuthwa okanye ukugcinwa kolwandle.