The Ministry of Statistics and Programme Implementation gives considerable importance to coverage and quality aspects of statistics released in the country. The statistics released are based on administrative sources, surveys and censuses conducted by the Center and State Governments and non-official sources and studies. The surveys are designed by using scientific sampling methods. Field data are collected through dedicated field staff. The methodological issues concerning the compilation of national accounts and other statistics are overseen by the Advisory Committee on National Accounts, Standing Committee on Industrial Statistics and Technical Advisory Committee on Price Indices. The Ministry compiles data sets based on current data, after applying standard statistical techniques and extensive scrutiny.