The protocol for the Museum is to show up a bit before it opens and wait outside the main factory gate. A small group is typically gathered there. When they open they will show you to the museum and more or less move you through from one end to the other, eventually coming to the gift shop from where you exit the facility. I've been on the museum tour multiple times and on the infrequent factory tours a couple of times long ago, pre-Piaggio.
