This book introduces evaluation by focusing on the main kinds of `big picture' questions that evaluations usually need to answer, and how the nature of such questions are linked to evaluation methodology choices. The author: shows how to identify the right criteria for your evaluation; discusses how to objectively figure out which criteria are more important than the others; and, delves into how to combine a mix of qualitative and quantitative data with `relevant values' (such as needs) to draw explicitly evaluative conclusions.