ʻOku kau ʻi he mape ʻo e koloa ʻa e fakatata fakakatoa ʻo e fakatahaʻanga, ngaahi ta fakatata ʻo e fakatahaʻanga iki, mo e ngaahi fakatata kehekehe ʻo e konga fakafoʻituitui. ʻOku kau ʻi he ngaahi fakamatala fakapepa fakatekinikale ʻa e ngaahi fakahinohino pau, ngaahi fakahinohino ki hono fakaʻaongaʻí mo hono tauhí, pea pehe ki he ngaahi fakahinohino fekauʻaki mo e fakatahaʻanga.
ʻOku tasked ʻa e kau ngaue fakatekinikale ʻi hono vakaiʻi e faʻunga fakatahaʻanga ʻo e koloa mo hono manufacturability, maʻu mei he ngaahi fakatata ko ʻeni. Kuo pau ke nau fokotuʻu ha ngaahi tuʻunga moʻui ʻoku nau tali ʻo makatuʻunga ʻi he ngaahi fakamatala fakatekinikale. ʻI he taimi ʻoku fie maʻu a, ʻOku totonu ke nau fakahoko pehe mo computations fekauʻaki mo e seini ʻo e fakatahaʻanga (ke maʻu ha mahino ki he ngaahi seini, vakai, GB/T847-2004 “Ngaahi founga ki hono fikaʻi ʻo e ngaahi seini fua” mo e ngaahi tohi mahuʻinga kehé).