The Inter-agency and Expert Group will continue its technical work on reviewing and refining the indicators, as needed, and on further developing the methodologies for estimation, also as needed. See also the report of the Inter-Agency and Expert Group on Sustainable Development Goal indicators (E/CN.3/2016/2/Rev. Implementation of the Millennium Development Goals agenda brought international attention and resources to bear on improving the methodologies and information systems that supported Millennium Development Goal monitoring and policy implementation. The Millennium Development Goals Report 2015, while confirming that there have been significant improvements in country coverage of core human development indicators, also recognizes that large gaps remain in respect of ensuring the quality and timely availability of data, including data disaggregated by geographical region, ethnicity, disability and other socioeconomic attributes, which are critical to the understanding of inequalities and vulnerability.