And so improvements in efficiency per unit of labor and per unit of machine is called total factor productivity. (freakonomics.com)
The economic term is called total factor productivity - it measures how much stuff a country can produce given a certain amount of inputs (land, capital, labour, etc). (politics.stackexchange.com)
Allowing for these changes in capital and labour inputs, total factor productivity grew at rates of 1.4 and 1.2 per cent in the first two expansions; in the 1990s expansion it is estimated to have grown at the stronger rate of 1.6 per cent. (rba.gov.au)