[Clifford]

We reherse once or twice and cross or fingers.

Well, sort of. We'll have our rehersals and dress rehersals to figure out what we need to be doing. During the show the SM communicates with the ASMs (one for each side of the stage) to ask when the stage is set. If there are any questions about anything the ASMs ask the SM for the right changes. Basically each person learns and knows what they do. The ASMs just have to know what the stage is supposed to look like for the next scene so that they can see whether anything is missing or not. Works for us.