Even the smallest scale project evaluation involves some kind of monitoring. The purpose of this is to document project delivery, usually recording the numbers taking part, the settings where the activities took place, the types of activity offered, and the outputs from the activity, including creative outputs such as artworks, music and performance. This often involves some form of quantitative reporting of numerical data in tables, charts and graphs. In this document we outline the key issues to consider when undertaking quantitative evaluation of arts and health projects.