Directed to three audiences--rehabilitation counselors, administrators in vocational rehabilitation, and decision makers in policy organizations--this document focuses on how to measure what happens to a disabled person who receives vocational rehabilitation services. Chapters 1 and 2 give background information on rehabilitation outcome measurement systems and a brief overview of the document purpose, respectively. Chapter 3 provides an overview of how outcome measurement is conceptualized, how outcome measurement systems are used by each of the three audiences above, and what impact outcome measurement has at these three levels. Chapter 4 describes in more detail what the current parameters of outcome measurement in rehabilitation are, including relevant federal standards. Chapter 5 is a catalogue of recently developed measures of rehabilitation outcomes that may have potential for improving the overall systems. Chapter 6 discusses research studies now underway to develop further improved outcome measurement systems, and gaps in the body of knowledge about outcome measurement that still need to be closed. Chapters 7 and 8 discuss the impact of outcome measurement on counselors, administrators, and policy makers. Chapter 9 presents some tentative prescriptions for taking action to improve outcome measurement systems. Chapter 10 makes a few predictions about the future of outcome measurement systems. An annotated bibliography is appended. (SH)