I roto i te oumu whakamahana, ko te kōwhiringa o te rauemi whakapuru oumu ka pā tika ki te ngaronga rokiroki wera, te ngaronga whakamarara wera me te tere whakamahana o te oumu, ā, ka pā hoki ki te utu me te roa o te ora o ngā taputapu.
Nō reira, ko te penapena pūngao, te whakarite i te roa o te mahi, me te whakatutuki i ngā whakaritenga hangarau, koinei ngā mātāpono matua me whai whakaaro i te wā e whiriwhiri ana i ngā rauemi arai oumu. I roto i ngā rauemi arai oumu penapena pūngao hou, e rua ngā rauemi penapena pūngao kua piki haere te rongonui, ko tētahi he pereki māmā ātete-wera, ko tētahi he hua huruhuru muka uku. E whakamahia whānuitia ana ēnei ehara i te mea mō te hanga oumu maimoatanga wera hou anake, engari mō te whakawhiti i ngā taputapu tawhito.
He momo rauemi whakamahana ātete hou te huruhuru muka uku. Nā te ātete ki te pāmahana teitei, te iti o te kaha wera, te pumau pai o te pāmahana matū, me te ātete pai ki te makariri me te wera ohorere, mā te whakamahi i te huruhuru muka uku hei rauemi mata wera, hei rauemi whakamahana rānei o te oumu whakamahana whānui ka taea te penapena pūngao mā te 10%~30%. Ka taea te penapena pūngao tae atu ki te 25%~35% ina whakamahia ana i roto i ngā oumu ātete pouaka whakaputa wā me te mahi wā poto.%. Nā te pai o te pānga penapena pūngao o te muka uku, me te whanaketanga whānui o te mahi penapena pūngao, kei te whānui haere te whakamahinga o te huruhuru muka uku.
Mai i ngā raraunga i homai i runga ake nei, ka kitea mā te whakamahi ingā hua huruhuru muka ukuhei whakaputa ke i te oumu maimoatanga wera ka taea te whiwhi i ngā pānga penapena-pūngao pai.
Wā tuku: 9 o Ākuhata 2021
