This supplement attempts to amplify certain points made by the study of productivity rates of earth moving machines, including bulldozers, motorized scrapers, towed scrapers, and front-end loaders. Specifically, it discusses the following: (i) the definition of productivity and explanation of relevant time categories; (ii) the variation of productivity due to site conditions, climate, and other parameters, as well as the apparent variation depending...
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详细
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1975/08/31
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工作文件
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UNN293
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1
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1
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2017/12/16
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Disclosed
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World Bank study of the substitution of labor and equipment in civil construction : productivity rates of earthmoving machines
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short period of time