A book that's turned up, and been useful, again and again since I first encountered it in a Total Quality Leadership (TQL) program, the military version of Total Quality Management (TQM), back in the 90s while on active duty as a Marine officer, then again in a public health job a decade later. Dr. Deming was the innovator who tried to share what he'd learned about managing processes to the U.S. auto industry, then went to Japan when Detroit ignored him, with the results visible in the products of Toyota, Nissan, Honda, Subaru, Isuzu, Mitsubishi... this approach is suited to any system in which processes are defined and repetitive; though it wasn't a good fit for the less structured role of the combat arms specialties in the military, it worked well for supply and data systems there.