Igumbi lesibili elakhiwe ngaphambili

Uhlobo olusha lwemishini yokulawula ehlakaniphile

Uhlolojikelele lomkhiqizo

Imishini yesibili ingahlanganisa imishini yesibili, umzimba, i-hvac, ukukhanyisa, ukuvikelwa komlilo, ukuphepha, isithombe nezinye izinto zokusebenza zibe yinto ephilayo, ilandele "ukuphepha, ukusebenza, ukuguquguquka, umnotho" isimiso sokuxhumanisa nokubumbana, kusetshenziswa umshini wokuhlanganisa uhlobo lwesitsha sesibili, qaphela "umklamo ojwayelekile, ukucubungula kwefekthri, ukwakhiwa kwangaphambili", kunganciphisa ngempumelelo umjikelezo wokwakha wobunjiniyela kanye nekhwalithi, kuthuthukise ukusebenza kahle komjikelezo wokwakha wobunjiniyela, ukuthuthukisa ukusebenza kahle kokwakhiwa kobunjiniyela. Manje seyiyonga ugesi, yonga umhlaba kanye nokuvikela imvelo.