Evaluation examines policies and programs across every arena of human endeavor, from efforts to stop the spread of HIV/AIDS to programs that drive national science policy. Relying on a vast array of methods, from qualitative interviewing to econometrics, it is a "transdiscipline," as opposed to a formal area of academic study. Accounting for these challenges, Evaluation Foundations Revisited offers an introduction for those seeking to better understand evaluation as a professional field. While the acquisition of methods and methodologies to meet the needs of certain projects is...