Annual Survey of Industries (ASI) is conducted by National Sample Survey Office (NSSO). ASI is principal source of industrial statistics in India. It does not cover unorganized or unregistered or informal sector enterprises. 

• ASI, an annual event, not only facilitates suitable data collection based on appropriate sampling techniques but also ensures timely dissemination of statistical information to asses and evaluates the dynamics in composition, growth and structure of organized manufacturing sector. 
• The structure and function of the industrial sector is an important perspective of Indian Economy. It is imperative for industries to grow both qualitatively and quantitatively to boost the economy.  
• The well-being of the industries depends truly on the formulation and promotion of industrial policies framed by the policy makers.  
• To frame suitable industrial policies the policy makers, need to be aware about the quantified aspect of the existing scenarios in the industries in the country.  

• This is where the Annual Survey of Industries (ASI) is conducted by National Sample Survey Office, Government of India. 

Source: Sriram’s IAS