There have been many research papers focused on development of guidelines, indicators, metrics, methods, tools, and systemsall related to sustainability performance assessment. However, manufacturing companies have difficulty in finding papers that are relevant to their sustainability goals and conditions. A research inventory is a data repository for storing research papers in a manner that makes them easy to retrieve. To be successful, therefore, the inventory must have a system for managing, in a systematic manner, the results generated by a large number of researchers around the world. In this paper, we propose a framework for a research inventory that focuses on papers that report on research related to manufacturing sustainability assessment. This proposed framework consists of two parts: an operational definition and a classification scheme. The definition distinguishes between those papers that belong in the inventory and those that do not. The classification scheme is used to tag/code papers for retrieval. We demonstrate the use of this proposed framework using the Sustainable Manufacturing Toolkit of Organization for Economic Cooperation and Development.