David StreatfieldDavid Streatfield has been involved with impact evaluation for more than thirty years. He is Principal of Information Management Associates a consultancy, training and research team focused on evaluating information and library service provision and articularly on assessing the impact of these services. He is the co-author of Evaluating the Impact of your Library published by Facet Publishing in 2006 and, in a new and fully revised edition, in 2013. Read More Read Less