Tsarin kayan aiki m zane, dukan kyau, m da ƙananan kuskure, high daidaici.
Kayan aiki yana da tasiri sosai, adana makamashi, aminci, samarwa kamar yadda yake.
Mafi mahimmancin halayen kayan aiki shine kwanciyar hankali mai kyau, aiki mai sauƙi, sauƙi mai sauƙi, cikakken ƙwarewa ta atomatik, rashin lafiyar ƙananan farashi.