The concept of dimensions clusters single indicators describing the quality of national statistical systems into broader thematic blocks. It is derived from the Statistical Capacity Indicator framework of the World Bank and augmented with the dimensions Use/Demand and Innovations. Other concepts for assessing statistical quality (e.g. UN NQAF, IMF DQAF, EUROSTAT QAF, Statistics Canada Quality Assurance Framework) proved less adequate for the purpose of this project, since features such as Accuracy or Consistency were in this case not reliably quantifiable.