National Human Development Reports (NHDRs) are the organization's most visible instrument for advocating sustainable human development around the world - UNDP's mandate. NHDRs are now produced or overseen by more than 130 UNDP country (and regional) offices, resulting in nearly 550 reports and a large number of disaggregated and supplementary human development indexes, reflecting national and local conditions. This evaluation assesses the strategic relevance, effectiveness and sustainability of the NHDR system-that is, the sum total of policies, practices, organizational structures and networks linked to producing and disseminating the reports-since its inception in 1992.