He tino tohutohu me te whakamahere pai rawa te whakarite i te mātaitanga o te kawe pounamu hei whakatōmuri. Ko te whakaaetanga ko te niho iti i mahia ai ki ngā niho pounamu, ka tōmuri i te wā e kawe ana i te mahi. E ārai ana tēnei whakaaetanga i ngā rauropi kiko nui, pērā i ngā whatu, ngā karahi, me ngā poraka. Heoi anō, ka whai hua tēnei whakaaetanga i roto i te whenua rangi hei whakahokia i ngā pūkeko matua nui i te one. Ki te kitea e koe he whakamahi whaiaro, ka whakanuia te mahi nei i te mea ko ia te tini o ngā niho pounamu e whakatōmuri ana i te kawe hei whakawehewehe i te rauropi i te wā e kawe ana. Nō te nuinga o ngā hoko e hīkina ana, he huarahi pai rawa tēnei, pērā i te mea ka heke iho te mate i te whakarite i tēnei whakaaetanga i te tuatahi, arā, te rau kore i te whakarite i ngā momo kē, arā, te rau kore i te whakarite i te rau kore. Nei pea, ka whakamahia tēnei whakaaetanga hei whakatōmuri i ngā tahuhu pai, ka whakaiti i te hiahia mō ngā mahi whakamutunga e hiahiatia ana i muri i te tōmuri.