Libraries made the decision in early 2012 to convert its bibliographic records from a single record approach, with multiple formats of a title on one bibliographic record, to a separate record approach, where each format receives its own record. This decision was several years in the making, as it was a change that would potentially require breaking apart more than 20,000 records. It would involve numerous staff from different departments and would require adjustments for all staff who worked with library users. This article will discuss the factors that pushed the UNR Libraries to make this decision to split its records and the challenges technical services staff faced in managing the project. The authors will present the different procedures developed for splitting monographic and serial records and the different tools that were used to make the process work: Millennium (especially the ERM and Global Update modules), MarcEdit, and Serials Solutions' MARC Updates service.