Ecological sustainability in production does not only cause a positive contribution to environmentalism, but also leads to a longterm improvement of the companies’ competitiveness. Due to a lack of transparency, many companies face difficulties rating their own resource efficiency. This article deals with the introduction of a ratio system, which allows companies to evaluate the efficiency concerning their usage of resources. This enables companies to enhance their consumption transparency. Besides, this article discusses the challenges of using ratio systems and the comparison of ratios in general.