The Consumer Price Index is the main base for calculation of Dearness Allowance for the Central Government and State Government Employees and also the Industrial and Bank Employees.
The Consumer Price Index (CPI) is calculated using following steps:
a) Market prices are collected for 252 items by the Officials of Department of Statics and Department of Posts. These prices of that item & place are sent to Central processing unit from 78 centres all over India ( which are enclosed for your reference).
b) The all India weights given the each category of items such as food 49.71%, housing 9.77 %, fuel 9.49% , footwear O.68%, transportation 7.5%, Medical 5.31%, Personnel care 2.92 % & Miscellaneous 26.31% total 100% . CPI points are determined using this all India weights and prices of the 252 items. (which are enclosed for your reference).