Labour productivity is usually measured in terms of output per worker or per hour worked.
"This can be calculated at enterprise, industry of national level. The growth of
labour productivity determines the real margin from which pay increases (and other increases income) can be paid, and indeed is used by trade unions in bargaining and as a justification for pay increases. In its turn,
labour productivity is determined by production techniques (including the organization of production), capital stock and sales".
(Eurofound,
Labour productivity, consulted 2011-07-25)