Human Development Index (HDI) is a summary measure of human development. It measures the average achievements in a country in three basic dimensions of human development:

1.A long and healthy life as measured by life expectancy at birth.

2.Knowledge, as measured by the adult literacy rate (with two-thirds weight) and the combined primary, secondary and tertiary gross enrolment ratio (with one-third weight)

3.A decent standard of living, as measured by GDP per capita (ppp US $).