Kowane samfur za a gwada da kyau don saduwa da dacewa aminci da ƙa'idodin aiki.Gwaji kamar Gwajin Nan take, Gwajin jinkirin lokaci, ƙarƙashin gwajin ƙarfin lantarki, gwajin wuce gona da iri, gwajin ɗan gajeren lokaci, gwajin lokacin rayuwa, gwajin tashin zafin jiki..etc