Ka'idar aiki na tukunyar jaket ɗin ita ce yin amfani da dafa abinci na baya. A taƙaice, shine a yi amfani da iska mai matsa lamba don ƙara matsa lamba a cikin tukunya don hana gwangwani fitowa da tsalle. Sabili da haka, a cikin aiwatar da haifuwa da dumama, kada ku sanya iska mai matsa lamba, amma kawai kuna buƙatar kasancewa cikin yanayin adana zafi bayan isa ga zafin jiki na haifuwa. Bayan an gama haifuwa, lokacin da aka saukar da zafin jiki da sanyaya, ana dakatar da samar da tururi, kuma ana matse ruwan sanyaya a cikin bututun feshin ruwa. Yayin da zafin jiki a cikin tukunyar ya ragu, tururi yana takushewa, kuma matsa lamba a cikin tukunyar yana ramawa ta hanyar matsa lamba na iska. A cikin tsarin haifuwa, ya kamata a ba da hankali ga hanyar shayarwa ta farko, sa'an nan kuma a fitar da tururi don sa tururi ya zagaya. Hakanan ana iya lalata shi kowane minti 15 zuwa 20 don haɓaka musayar zafi.