Frederick Taylor's Essays, online External links Man-year defined as 2000 hours: https://web.archive.org/web/20060722155057/http://www.onr.navy.mil/02/matoc/05_09/solicitations/docs/05-0002-02.pdf (Solicitation Number 05-0002-02: Support Services for the Office of Naval Research for the Legislative Affairs Office (United States Navy Office of Naval Research: Arlington, Virginia, USA, 2004) Man-year defined as 2087 man-hours: Report 5, International Federation Of Professional And Technical Engineers Local 32: San Diego, California, 2000(counting 311 "Non-available/Nonproductive" man-hours) Work Labor Personnel economics