The Theory of Lean Documents is the product of applying lean principles to the creation, design, process, and management of controlled documents typically found in regulated industries. Just as lean principles challenge traditional process concepts and "push" systems, many traditional document practices are artifacts of a flawed approach. Lean documents presents a fresh departure from these practices, while building upon proven principles. Lean configuration comes from the same principles, utilizing the unique power of software solutions to take over functions that had previously burdened ccontrolled "paper" documents.