Izitebhisi ezivikelayo zisetshenziswa kakhulu njengamathuluzi okukhuphuka akhethekile okusebenza bukhoma kubunjiniyela bamandla kagesi, ubunjiniyela bezokuxhumana, ubunjiniyela bukagesi, ubunjiniyela bamandla kagesi, njll. Izici ezinhle zokuvikela isitebhisi sesitebhisi sokuvikela ziqinisekisa ukuphepha kwempilo kwabasebenzi ngokwezinga elikhulu kakhulu.