If there are no comparative methods, different approaches may be used if demonstrated to be appropriate, such as comparison to some other well-documented methods or the composite reference standard.
Mura bhfuil aon mhodhanna comparáideacha ann, féadfar cineálacha cur chuige eile a úsáid, amhail comparáid le modhanna dea-dhoiciméadaithe éigin eile nó comparáid leis an gcaighdeán tagartha ilchodach.