It is simple. If nothing in writing, then you should assume that it is a no go. Yes the hiring manager may really want you and verbally confirmed but there are

It is simple. If nothing in writing, then you should assume that it is a no go. Yes the hiring manager may really want you and verbally confirmed but there are a lot of "behind the scenes" factors that impact hiring. Of course, if you do finally get the offer in writing, good for you. The question is should you wait or move on. That will depend on where you stand. If you need a job asap, then keep looking. If not, you may wait for the confirmation in writing.