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2. Babban hanyar.

Dukkanin abubuwan da aka gwada ana gwada su har sai an samo bangaren matsala, kuma manufar gyara ana samunsu. Idan wani ɓangaren da ba za a iya gano shi ta hanyar kayan aiki ba, ana amfani da sabon kayan haɗin don maye gurbin yana da tabbacin yana da kyau don cimma manufar gyara. Wannan hanyar tana da sauki da inganci, amma ba shi da iko ga matsaloli kamar ta hanyar ramuka, da kuma gyara jan ƙarfe.

3. Hanyar kwatancen.

Hanyar kwatancen ita ce ɗayan hanyoyin da aka fi amfani da su don gyara allunan da'irar ba tare da zane ba. Aiki ya tabbatar da kyakkyawan sakamako. Dalilin gano gazawar shine ta hanyar kwatanta matsayin allon allunan. Fugu don nemo masani.

4. Wbinki sharaɗi.

Yanayin aiki shine bincika matsayin kowane abu yayin aiki na al'ada. Idan matsayin wani sashi yayin aiki ba daidai yake da matsayin al'ada ba, na'urar ko sassan da abin ya shafa ba su da lahani. Hanyar jihar ita ce hanya mafi kyau don yin hukunci tsakanin duk hanyoyin kulawa. Matsalar aiki ita ce ma bayan injin injiniyoyi gaba ɗaya. Yana buƙatar arziki na ilimin ilimin kimiyya da kuma kwarewar aiki.

5. Kafa da'irar.

Saita hanyar kewaya shine yin da'irar da hannu, kewaya zai iya aiki bayan shigar da da'awar da'irar, don tabbatar da ingancin da'irar da aka haɗa a ƙarƙashin gwaji. Wannan hanyar tana yin alƙawarin cewa adadin daidaito na iya kaiwa 100%, amma akwai nau'ikan da'irar da'irar da aka haɗa da su, kuma kunshin yana da rikitarwa.

6. Nazarin ka'idoji

Wannan hanyar shine bincika ka'idar aikin. Wasu allon, kamar canzawa kayayyakin wuta, suna buƙatar injiniyoyi su san ƙa'idodin aiki da bayanai ba tare da zane ba. Ga injiniyoyi, san mallakinsu makircinsu yana da sauƙin kiyayewa.