Incazelo:
Ukudluliselwa kwesikhumulo sezindiza kuhamba ngokuhlelekile okuhamba phakathi kwesikhumulo sezindiza kanye nokuphela kokuhamba kwebhizinisi.
Ukudluliselwa kwezikhumulo sezindiza kuvame ukukhokhelwa (ngokusebenzisa i-agent yezokuvakasha noma insizakalo yokubhuka), nakuba kungabuye kuhlelwe ngezinye izikhathi ukukhokhelwa okuhlukile.
Eziningi zezindiza ezinkulu zinamasevisi amaningi okuthutha kanye nezinketho zokuthutha zendawo.