Xa kufikwa kwiibhokisi zesiphambuka ezinobungqina bokudubula, Umbuzo oqhelekileyo kukuba ingaba umngxuma omnye unokuthatha ngaphezu kwentambo enye. Impendulo nguewe, kubonelelwe ukuba ububanzi bomngxuma bukhulu ngokwaneleyo ukuvumela ukudlula kweentambo ezininzi ngaphandle kokubeka esichengeni ingqibelelo yebhokisi okanye iimpawu zokhuseleko..
Nangona kunjalo, Kubalulekile ukuqaphela ukuba izixhobo zokungena kwikhebula ezikhusela uqhushumbo ziyilelwe ukuvumela kuphela intambo enye kwindawo yokungena.. Olu luyilo luqinisekisa ukhuseleko oluphezulu kwaye lugcina ingqibelelo yobungqina bokudubula kwebhokisi yesiphambuka, inkalo ebalulekileyo kwiindawo apho qhuma iigesi okanye uthuli lunokubakho.