Sicela uchaze ukuthi kungani ukungeza izinkomba ezengeziwe ku-database yobudlelwano kungasizi ngaso sonke isikhathi ukusheshisa imithwalo yomsebenzi.
Ezingeni eliphezulu, inkomba phezu kwetafula elithile ingasheshisa ukwenziwa kombuzo ofinyelela etafuleni inqobo nje uma umbuzo ubhekisa kusethi engaphansi ehambisanayo amakholomu ukuthi inkomba ihlanganisa nokuthi izindleko zokusebenzisa inkomba iphansi kunezinye izindlela (isib, ngokumane ukuskena lonke itafula noma usebenzisa enye inkomba). Ngasikhathi sinye, inkomba kumele igcinwe isesikhathini netafula, okusho ukuthi ukuvuselelwa kwetafula ngalinye (ukufakwa noma ukususwa kwemigqa emisha, noma ukuvuselelwa kwemigqa ekhona yamakholomu i-index ehlanganisa) manje kuzobiza kakhulu njengoba uhlelo lwedatha yobudlelwano kufanele futhi lusakaze ukuvuselelwa kwenkomba. Ngakho-ke, ukuba wusizo kokwengeza inkomba kumthwalo womsebenzi kuzoncika engxenyeni yemibuzo engazuza enkombeni, nasekuhlanganiseni kwemibuzo nezibuyekezo.