Ka tukuna e tēnei teihana mahi piko karetao aunoa katoa te tino tika me te tika o te tūnga 0.1mm, ka taea ai te hanga pepa whakarewa tino tika. Kei roto ko te whakawhiti tere 3-5 meneti mō te whakawhiti hua tere, he hoahoa modular mō te whakaputa ngāwari, me te tiaki haumaru maha-paparanga, ka whakarite kia whai hua, kia pumau, kia haumaru hoki te mahi. He pai mō te hanga whakarewa, me te hanga taputapu, ka whakanui ake i te hua, ka whakaiti i ngā utu mahi, ā, ka arotau i ngā rerenga mahi piko aunoa.
E whakaatu ana tēnei hoahoa i te reremahi katoa, tino aunoa o tā mātou pūnaha piko karetao: 1. Ka tangohia e te karetao te pepa whakarewa mata mai i te teihana uta; 2. Ka whakawhiti me te whakanoho tika i te wahi mahi; 3. Ka whāngaihia te rauemi ki roto i te mīhini piko kia tino tika te hanga; 4. Ka wetewete i te wāhanga kua piko kua oti, ka whakarārangihia mō te tukanga e whai ake nei. Ka tukuna e tēnei aunoatanga porowhita-kati te kounga ōrite, kāore he wawaotanga ā-ringa, me te hua nui mō te hanga pepa whakarewa.