Need answers asap

So because i am on subutex cps has to get involved. And they have to do a home check. I don't have to worry because there isnt anything bad in my house. But im just curious of how in depth they search. Or what they do while they do their thing until they clear me. Anyone have an idea or has been thru this?? Idk if I posted this in lye right place so just work with me lol