The time and resources required to prepare archival collections for use by researchers is a source of constant frustration in archives and libraries. Almost always, aspirations and collections exceed limited resources. The last fifteen to twenty years have seen archivists and librarians putting great effort into increasing standardization and efficiency. However, there are few examples of applying techniques from other fields that are proven to increase productivity. This dual case study shows that applying Lean techniques, which were originally developed for automobile manufacturing, yields significant results: measurable reductions in processing time and resource use; increased adherence to standards; increased engagement in and willingness to change by staff; effective coordination across departments; and increased ability to meet the needs of stakeholders.