This guide is intended to give workforce investment boards (WIBs) a practical framework for overseeing the performance of one-stop career centers. The introduction presents background information on a proposed quality assurance framework and the guide's format and development. The first two sections explain the importance of quality assurance to WIBs and the process of using supplier certification to ensure quality. The third section introduces the Malcolm Baldridge Quality Award Criteria, which are recommended as a framework for performing quality assurance and which focus on the following categories of organizational behavior: (1) leadership; (2) strategic planning; (3) customer and market focus; (4) information and analysis; (5) human resources focus; (6) process management; and (7) business results. The nature and scope of the criteria in each category are explained, and several examples of how each might be applied to local workforce development systems are provided. The remainder of the guide details the process of setting up a quality assurance process for a local workforce system. General guidelines about a WIB's role in certification are presented along with detailed steps for conducting the following certification-related activities: (1) initial certification; (2) ongoing performance assessment and continuous improvement; and (3) recertification. A list of eight World Wide Web sites providing additional information is included. (MN)