1.Umklamo womqeqeshi wemisipha ocindezela izingalo emuva uvumelana ne-ergonomics, enganciphisa ukucindezeleka futhi inikeze abavivinya umzimba ukuzinza nokulawula okuphezulu.
2.Uma isihlalo si-angled, ukwandiswa kwehlombe kunciphisa, okuthuthukisa ukuzinza nokunciphisa ukucindezeleka ekuhlanganyeleni kwehlombe, ngokulandelana.