The National Sample Survey Organisation (NSSO), now known as National Sample Survey Office, is an organization under the Ministry
of Statistics of the Indian Government. Primarily data are collected through nation-wide household surveys on various socio-economic
subjects, Annual Survey of Industries (ASI), etc. Besides these surveys, NSSO collects data on rural and urban prices and plays a significant role in the improvement of crop statistics through supervision of the area enumeration and crop estimation surveys of the State agencies.
The Annual Survey of Industries (ASI) is one of the large-scale sample survey conducted by Field Operation Division of National Sample
Survey Office with the objective of collecting comprehensive information related to registered factories on annual basis. ASI is the primary source of data for facilitating systematic study of the structure of industries, analysis of various factors influencing industries in the country
and creating a database for formulation of industrial policy.