dawn for that method ypu have to keep in mind both the dog and where the person lives, for example I cant just isolate my dogs outside because its -40*C thats is flippen cold way to cold to be tossing the dog out and leaving them, my friend american eskimo has to come inside in the winters because its too cold for his super thick coat. you also have to keep in mind the dog, for example, I cannot isolate misty say in the bathroom, because she will quite litterally break down the door(she has done it) you also must keep in mind the house layout, for example I have a very wide open layout in the house, its a complete ring with no doors If I leave her she will follow nothing I can do about that, I put her in her crate for time out however she loves her crate so that is not punnishment either, it is a great methode it just relies on the assumption that everyone have lots of doors, nice wheather, and a calm dog.