He mahi tiaki haumaru te parepare, he whakapaipai i te waka, he whakapai ake hoki i ngā āhuatanga hauhautanga o te waka. Mō te haumaru, ka taea e te waka te mahi hei ārai i te tukinga tere iti, me te tiaki i te tinana o mua me muri; ka taea e ia te tiaki i ngā kaihaerere mēnā ka pā mai he aituā ki ngā kaihaerere. Mō te āhua, he whakapaipai, ā, kua noho hei wāhanga nui hei whakapaipai i te āhua o ngā waka; I te wa ano, he pānga hauhautanga anō hoki tō te parepare waka.
I taua wā anō, hei whakaiti i te whara o ngā pāhihi mēnā ka pā mai he aituā taha, ka tāutahia he parepare tatau ki runga i te motuka hei whakapakari i te kaha ārai-tukituki o te tatau. He tikanga whai hua, he māmā hoki tēnei, he iti noa ngā huringa ki te hanganga o te tinana, ā, kua whānuitia te whakamahinga. Mai anō i te Whakaaturanga Motuka o te Ao o Shenzhen i te tau 1993, i whakatuwherahia e Honda Accord tētahi wāhanga o te tatau hei whakaatu i te parepare tatau ki te hunga mātakitaki hei whakaatu i tōna mahi haumaru pai.
Ko te tāutanga o te parepare tatau he whakatakoto i ētahi kurupae maitai kaha-kaha ki roto i te panera tatau o ia tatau, he mea whakarite whakapae, he mea whakarara rānei, e mahi ana hei parepare o mua, o muri hoki, kia "ārahi" ai te motuka katoa e ngā parepare i mua, i muri, i maui, i matau hoki, kia hanga he "taiepa parahi me te taiepa rino", kia tino haumaru ai ngā pāhihi o te motuka. Ko te tikanga, mā te tāutanga o tēnei momo parepare tatau ka piki ake ētahi utu mō ngā kaihanga motuka, engari mō ngā pāhihi motuka, ka nui ake te haumaru me te wairua haumaru.
