The University of Michigan Library has released Finding the Public Domain: Copyright Review Management System Toolkit.
Here's an excerpt:
This toolkit is divided into three main parts. It is primarily designed for copyright review of books, but it is also useful for a range of copyright review activities. The first part of the toolkit consists of a series of preplanning documents, one or more of which can be used in early-stage project meetings to build your team and plan your approach when faced with key questions. . . .
The second part of the toolkit dives deeper into the practical considerations facing a copyright review project, including project leadership, the legal fundamentals for copyright review, technical elements, and observations related to project personnel. . . .
The third part of the toolkit includes reports on pilot projects and a series of appendices. Together these form valuable documentation from the [Copyright Review Management System] project.