Govt exploring new method for calculating GDP with changing weights

The weights assigned to various products and activities will keep updating but the base year will remain the same

The government is exploring a new methodology of calculating the gross domestic product (GDP) which will keep updating weights assigned to various products and activities in the economy.  

The new methodology, called the chain base method, however does not change the base year by itself, notwithstanding the impression given by its nomenclature. The base year changes when the government decides to change it, say in five years.  Also, products and services remain the same, unless the base year is changed. 

So, if the chain base index is applied to the current series for the year, say  2019-20, the base year