Ko ēnei tawhā kua whakatauria e tohu ana i ngā āheinga rerekē o te motuka.

I roto i te papa ingoa o tehua motuka, ka whakarārangihia ētahi tawhā nui pēnei i te mana whakatauranga, te ngaohiko whakatauranga, te iahiko whakatauranga me te auau whakatauranga o te motuka. I roto i ngā tawhā whakatauranga maha, koinei ngā tawhā taketake i runga i te mana whakatauranga hei anga taketake; mō te motuka auau mana, ina tutuki te ngaohiko whakatauranga, te iahiko whakatauranga me te auau whakatauranga o te motuka i ngā whakaritenga, ka taea e te motuka te mahi noa. I raro i te āhua whakatauranga e rite ana, ka taea e te motuka te whakaputa i te taipana whakatauranga, e whakaatahia ana i roto i te kaha o te motuka ki te tōia te kawenga. Mō ngā motuka auau rerekē, nā te rerekētanga o ngā āhuatanga o te auau mana whakauru, ka whakahaerehia te aratau whakahaere whānui o te motuka i raro i ngā tikanga whakahaere taipana pumau me te auau pumau hei whakarite i te haumaru o te mahi motuka. Mā te whakarāpopoto noa i ēnei tawhā whakatauranga o te motuka, ka taea te wehewehe kia rua ngā wāhanga: te haumaru miihini me te haumaru hiko.

Ko te haumaru ā-pūkaha o te motuka e tohuhia ana e te taipana kua whakatauria. Ko te rahi o te taipana motuka ka pā tika ki te āhua o te pūnaha whāriki me te rakau hurihuri. Hei tauira, mō te motuka taumaha, me ōrite ki ngā whāriki ka taea te kawe i te kawenga nui ake; ina nui te taipana o te motuka, ka pā kino ki te kounga mahi o te whāriki; i te wa ano, hei tāpiri atu ki te kounga mahi o te pūnaha whāriki, ka taea e te taipana nui ake te whakapiko, te pakaru rānei o te rakau, inā koa mō ngā rakau whakarewa, ka nui ake te nui o ngā pānga kino.

Ko te haumaru hiko o te motuka e tohuhia ana e te ngaohiko whakatauranga me te iahiko whakatauranga. Ina nui te ngaohiko whakatauranga, ka piki ake te ngaohiko i waenga i te takai, ka kore e pono te whakamarumaru i waenga i te takai; ina nui rawa te iahiko motuka, ka pā tika te takai ki te kiato iahiko nā te nui o te iahiko, ā, ka nui ake te kiato iahiko ka wera rawa te kaiārahi, ā, ko te mutunga iho ka piki ake te pāmahana, ka tūpono atu ki te pono o te hiko o te motuka.

Nō reira, ahakoa he motuka auau arumoni, he motuka auau rerekē rānei, ko te haumaru o tana mahi e aro ana ki te haumaru ā-mīhini me te haumaru hiko. Ka pā kino tetahi peka ke atu i ngā tikanga kua whakatauria ki te motuka.