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a. Output (usually in hundredweights) per manshift. It is a method of
expressing the productivity of mines, miners, and management.
Nelson
b. N. of England. Output (usually tons) per manshift. Interpretation
depends on the basis for calculating manshifts, e.g., face o.m.s. is based
on manshifts at the face; seam o.m.s. on piecework and bargain work
manshifts in the seam; overall (pit) o.m.s. on all manshifts underground,
including datal labor. Trist
Source:
Dictionary of Mining, Mineral, and Related Terms
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