The University of Houston Main Library collection is a large, multi-format, and ever evolving research collection supporting a large student, faculty and research population. The library is tasked with directly supporting the overall mission of the university which states "The mission of the University of Houston is to offer nationally competitive and internationally recognized opportunities for learning, discovery and engagement to a diverse population of students in a real-world setting. The collection strives to support over 12 academic colleges and an interdisciplinary Honors college as well as a diverse offering of over 120 undergraduate majors. In order to achieve this level of support for the university community, a large collection assessment including data collection from multiple sources is necessary to capture current coverage per subject. A project team was formed and tasked with designing and developing a high-level collection assessment project to assess the breadth and coverage of both print and electronic resources at the University of Houston MD Anderson Library. The collection assessment focuses on developing methodology to best capture current holdings per call number ranges as well as analysis of the holdings. The subject analysis includes gathering data from circulation, usage reports, interlibrary loan database, and the OPAC in order to understand the current strengths and weaknesses of both the print and electronic content per subject area. This data collection constitutes the first phase of the research project and the research team proposes to present some initial findings along with a brief overview of the methodology. Future directions will be presented including our need to validate this data against acquisitions data and interlibrary load data for the past several years to identify potential subject areas that need further collection development. Presenters: Jackie Bronicki Collections and Online Resources Coordinator, University of Houston Irene Ke Psychology and Social Work Librarian, University of Houston Cherie Turner Chemistry Librarian, University of Houston Shawn Vaillancourt Education Librarian, University of Houston