This guide provides library directors, managers, and administrators in all types of libraries with complete and up-to-date instructions on how to evaluate library services in order to improve them.* Helps librarians to thoroughly examine their libraries' services toward making improvements* Enables librarians to answer with authority the question "what difference do we make?"* Explains the most effective ways of conducting library measurement and evaluation, covering qualitative and quantitative tools, data analysis, and specific methodologies for measuring and assessing specific services* Offers a highly readable and clear treatment of a topic of paramount importance, but that librarians often find difficult.