CEVAP:

The HDI has two main features.

The first feature of the index is the scale it uses. It uses a scale to rank the nations in terms of development.

Secondly, it develops an index based on three equally weighted components:
(i) Longevity, measured by life expectancy at birth, (ii) Knowledge, measured by adult literacy and number of years children are enrolled at school, and (iii) Standard of living, measured by real GDP per capita.