This may be of interest to prospective writers (or anyone wishing to better understand the steps involved with traditional publishing): an infographic by Rachel Doll, University Press of Florida, shows a book’s journey from conception to publication.

It lays out explicitly at what point in the process the page proofs or the book itself, for example, will be available, and some of the times that each step requires. The graphic is available for download as .pdf from University Press of Florida.
How It Happens is an occasional feature looking at the inner workings of various creative efforts.