Patton demonstrates that the main failing of most evaluations is a lack of practicality. They fail to be cheap, accurate, attuned to the differences between different programmes or to provide useful, realistic policy alternatives for decision-makers. Patton discusses the major stages of the evaulation process, describing evaluation design, measurement, analysis and reporting. Using his own field and workshop experiences, he provides a new vision of evaluation that emphasizes the elements of feasibility, efficiency, and utility.