The Dashboard's Regional Development Index is composed of 3 sub-indices (in brackets: No. of indicators): Economy (7), Social services (20), Environment (6). The database contains 33 indicators for 120 districts.
The data come from Research on Poverty Alleviation, REPOA, a non-profit, non-governmental organisation (NGO) based in Tanzania. Please contact REPOA if you would like to quote them. The Dashboard uses these data to produce aggregate indices, but this does NOT imply that REPOA agrees with the specific Dashboard way of calculating aggregate scores.
The material for Tanzania was extracted from the Poverty and Human Development Report 2005, available here. This report was produced by REPOA of behalf of the Research and Analysis Working Group, Ministry of Planning, Economy and Empowerment, The United Republic of Tanzania.
The PHDR was looking for targets of Tanzania's National Strategy for Growth and Reduction of Poverty (MKUKUTA) that are met, so the data were generated with this aim in mind. While the Dashboard uses a "one type fits all" legend, there are indicators that should always be in the shades of red or shades of green. For example:
Enrolment, health facilities in shades of green
Poverty, orphans in shades of red
Pupil teacher ratio in shades of both red and green (for areas where targets are met)
The rankings presented here should be taken with great caution. While the aggregate indices will often look convincing and plausible, for individual indicators there may be huge deviations from the real World.
The blame should neither be put on the Dashboard (it just makes the data more visible), nor on the statistical services who produce indicators under very difficult financial and political restraints. We hope that the Dashboard will help to demonstrate the need for better co-ordination of data collection, and to advance towards a generally accepted set of core indicators of Sustainable Development.