KungoyiwalaKusankhidwa kwa matenthedwe ndi kusankha njira kumachitika nthawi imodzi, chifukwa chake, mfundo zotsatirazi ziyenera kugwidwa ndi chidwi posankha kukula:
(1) Tsatirani lamulo la voliyumu losalekeza, kukula kwa njirayi kuyenera kutsatira mfundo zazikuluzikulu za chilichonse; Pambuyo pa ntchito, voliyumu isanathe kulinganizo ndi kuchuluka kwazomwe mungatsatire. Voliyumu yonseyi imatanthawuza kuchuluka kwa kuchuluka kwa zinthu zomaliza zomaliza zomwe zimapezeka ndi njirayi komanso kuchuluka kwa kutaya zinthu kwazinthu zomwe zimachitika.
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. Mwachitsanzo, mukamakoka koyamba kenako ndikukhumudwa, simungathe kutero motalika kwambiri, popanda kukhumudwitsidwa ndi kuwerama.
(4) Mukamapanga zigawo, ndikofunikira kuonetsetsa kuti gawo lirilonse lili ndi voliyumu yokwanira.

(5) litiKupirira Moto, kuthekera kwa malo okhala pakati pa moto wapakati kuyenera kuganiziridwa, monga kukula kwanjira, Moto wapakati, chinthu chomalizidwa cha semi chitha kuyikidwa mu ng'azani ng'azani ndi zina zotero.
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(7) Kwanthawi yayitaliShaftKukula kwa gawo lalitali ndikolondola, ziyenera kukumbukika kuti kutalika kwake kumawonjezeka pang'ono mukamavala.
Kuchuluka kwa mutu waShaftayenera kukwaniritsa zofunika.