Abstract:Regarding the problem analysis of complexity of manufacturing capacity (MC), fuzziness and abstraction of MC concept, and the difficulty of clearly defining MC due to high volume of information for quantifying MC oriented cloud manufacturing, the definitions of MC concept were presented by combining previous relative research, which are the basis and premise for analyzing MC. Second of all, a relation model of MC and information, hierarchy tree of classes associated with properties based on weight, was established. Based on this, by adopting set theory and hierarchical decomposition methods, MC was formally represented and done the multi dimensions and multi levels decomposition, in details. The method could provide information support for MC calculation and evaluation.Last but not least, the relation model of production capacity as an example and information was established and formally represented, and then performance quality is calculated to analyze the quality factor and quality problems, which is a part of calculating and evaluating manufacturing capacity comprehensively.