1. Zaba Bisa Muhalli
Mahalli daban-daban za su yi tasiri ga adadin matakan da ake buƙata don fashewa{0}} Misali, a cikin shuke-shuken sinadarai, saboda hadaddun mahalli da haɗari, gabaɗaya ana buƙatar yadudduka biyu zuwa uku. A cikin wurare mafi sauƙi, kamar ƙananan kwantena da bututun mai, Layer ɗaya na iya isa.
2. Zaɓi Dangane da Fashewa -Sharuɗɗan Hujja
Fashe daban-daban{0}}Bukatun hujja kuma za su yi tasiri ga adadin yadudduka da ake buƙata don fashe{1}}abubuwan shaida. Gabaɗaya magana, don buƙatu masu sauƙi, kamar ƙananan kwantena da bututun bututun, Layer ɗaya ya wadatar. Koyaya, don ƙarin hadaddun fashewar abubuwan buƙatun shaida, kamar a cikin masana'antun sinadarai, mai, da iskar gas, saboda babban haɗarin da ke tattare da shi, ana ba da shawarar nau'ikan bangarori biyu zuwa uku don ƙara ƙimar aminci.
