Te horoi i ngā rihi PetriHe tukanga hoha tēnei, engari mā tēnei tukanga ka pai ake te whai hua o ngā whakamātautau. Ki te kore e horoia te rihi petri, me nui ake te wā e pau i te kaiwhakamātautau ki te tukatuka i ngā raraunga whakamātautau. Ā, ki te tino horoia te rihi petri, ka taea e te kaiwhakamātautau te whakahaere i te whakamātautau me te whai hua ake.
Te horoi ā-ringa i ngā rihi Petri:
Ko te tikanga, e whā ngā taahiraa e whai ake nei: te ruku, te horoi, te whakapūkara, me te horoi.
1. Te ruku: Me ruku tuatahi ngā karāhe hou, ngā karāhe tawhito rānei ki te wai kia ngawari ai, kia memeha ai ngā mea tāpiri. Me horoi noa ngā karāhe hou ki te wai puna i mua i te whakamahinga, kātahi ka rukuhia mō te pō ki te waikawa hauwai 5%; he maha ngā wā he nui te pūmua me te hinu kei roto i ngā karāhe tawhito, he uaua ki te horoi i muri i te maroke, nō reira me ruku tonu ki te wai ma i muri tonu i te whakamahinga hei ruku.
2. Horoi: Ringihia ngā karāhe kua rumakina ki te wai hopi horoi, ka horoi pinepine ki te paraihe ngohengohe. Kaua e waiho he wāhi takoto kau, kia kore ai e kino te mata o ngā karāhe. Horoia, ka whakamaroke i ngā karāhe kua horoia kia pīkara ai.
3. Te Whakapīkara: Ko te whakapīkara he ruku i ngā taputapu kua whakahuatia ake nei ki roto i tētahi wai horoi, e mōhiotia ana ko te wai waikawa, hei tango i ngā matū e toe ana i runga i te mata o ngā taputapu mā te waikura kaha o te wai waikawa. Kaua e iti iho i te ono hāora te whakapīkara, i te nuinga o te wā mō te pō, mō te roa atu rānei. Kia tūpato ki ngā taputapu.
4. Horoi: Me horoi katoa ngā oko i muri i te horoinga me te whakapūkara ki te wai. Ka pā te angitu, te kore rānei o te whakatipu pūtau ki te horoinga o ngā oko i muri i te whakapūkara. Horoia ā-ringa ngā oko i muri i te whakapūkara, ā, me "whakakīia-wātea" ia oko kia 15 ngā wā, ā, hei whakamutunga, me rumaki ki te wai kua whakapūkarahia kia 2-3 ngā wā, ka whakamarokehia, ka whakamarokehia rānei, ka tākaihia mō te whakamahinga i muri mai.

Te tikanga horoi mō te whakamahi i te XPZhoroi karaihe taiwhangahei horoi i te rihi petri:
Rahinga horoi: 168 ngā rihi petri ka taea te horoi i roto i te puranga kotahi
Te wā horoi: 40 meneti hei whakaoti i te horoinga
Te Tukanga Horoi: 1. Tāpirihia te rihi petri e horoia ana (ka taea te tāpiri tika te mea hou ki roto i te mīhini horoi pounamu, ā, me riringi te rihi petri me te rauemi ahurea i tētahi wāhanga nui ake o te rauemi ahurea kia rite ki te nui e taea ana) ki roto i te kete e rite ana o te mīhini horoi pounamu. Ka taea e te paparanga kotahi te horoi i ngā rihi petri e 56, ā, ka taea e te wā kotahi te horoi i ngā rihi petri paparanga-toru e 168.
2. Katia te tatau o te mīhini horoi pounamu, tīpakohia te kaupapa horoi, ā, ka tīmata aunoa te mīhini ki te horoi. Kei roto i te tukanga horoi te horoi-mua – te horoi matua kawakore – te whakakore waikawa – te horoi wai parakore.
3. I muri i te horoinga, ka tuwhera aunoa te tatau o te mīhini horoi pounamu, ka tangohia te rihi ahurea kua horoia, ka neke ki ngā taputapu whakahoromata mō te whakahoromata.
He wāhanga tino nui o te whakahaere taiwhanga te horoi i ngā rihi petri i roto i ngā taiwhanga koiora. Mā te whakamahi i tētahi mīhini horoi pounamu aunoa hei utu mō te horoi ā-ringa ka taea te karo i te pānga o te poke whakawhiti ki ngā raraunga whakamātautau, te tiaki i te hauora o ngā kaimahi whakamātautau, me te whakapai ake i te whai huatanga o te whakamātautau.