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...Issn print online journal of system and management sciences vol no pp riskmetrics model in purchasing risk measurement wan xiao yang sheng long associate professor school economics beijing jiaotong university china master specilist development managemen post life insurance abstract var value at has been one the most attractive tools recent years as a quantitative to measure control financial compared with traditional models it is easy understand apply so have more practical referential significance however application method limited this paper analyzes set up keywords metrics statement problem widespread acknowledgement that competition companies stepping into era supply chain resource always origin operation quality price products are definitely determined by raw materials we all know cost occupies first position other costs any deviations emerged during links an effect on realization company s corresponding author tel e mail address wanx sina com anticipated goal further will influen...