AN OVERVIEW OF REVISION OF BASE YEAR OF ALL-INDIA INDEX OF INDUSTRIAL PRODUCTION (IIP)


Introduction  

                     Index of Industrial Production (IIP) is an abstract number, the magnitude of which represents the status of production in the industrial sector for a given period of time as compared to a reference period of time. It is a statistical device which enables us to arrive at a single representative figure to measure the general level of industrial activity  in the economy. Strictly speaking, the IIP is a short-term indicator of industrial growth till the actual results from Annual Survey of Industries (ASI) become available. This indicator is of paramount importance to the Government for policy planning purposes and is also being extensively used by various organisations including Industrial Associations, Research Institutes and Academicians.

                                1.   In India, the first official attempt to compute regularly the Index of Industrial Production was made much earlier than even the recommendations on the subject at the international level. The Office of the Economic Advisor, Ministry of Commerce and Industry made the first attempt of compilation and release of Index of Industrial Production with base year 1937, covering 15 important industries, accounting for more than 90% of the total production of the selected industries. Subsequently, the base years were revised twice, viz., to 1946 and 1951.

2.   With the inception of the Central Statistical Organization (CSO) in 1951, the responsibility for compilation and publication of the Index of Industrial Production (IIP) was vested with this office. The all-India IIP is being released as a monthly series since 1950. The general scope of the index of industrial production as recommended by the United Nations Statistical Office (UNSO) in May 1950, is defined to include Mining, Manufacturing, Construction, Electricity and Gas sectors. But, due to constraints of the data availability, the present general index of industrial production compiled in India has in its scope the Mining, Manufacturing and Electricity sectors only. 

3.   As the structure of industrial sector changes over time, it becomes necessary to revise the base year of IIP periodically so as to measure realistically, the  growth in the industrial sector. The UNSO recommends that the base year of the IIP may be revised quinquennially. The IIP series has been revised from time to time shifting the comparison base to a recent period, by reviewing the coverage of items and industries and by improving, as far as practicable, the technique of Construction with a view to reflect adequately, the industrial growth and structure. When the index was commenced in India, the base year adopted was 1937 and this was revised successively to 1946, 1951, 1956, 1960, 1970, 1980-81 and 1993-94.

(i)    Mining and quarrying sector consists of fuel, minerals, metallic minerals, non-metallic minerals and minor minerals. In respect of fuel minerals, data are collected from Coal Controller of India for coal and lignite. Statistics on petroleum (crude) and natural gas are received from Ministry of Petroleum and Natural Gas. The coal controller is supplying coal and lignite data for about 578 mines.

(ii)              IBM receives data in respect of metallic and non metallic minerals from about 3000 mines. As per the Mineral Conservation and Development Rules 1988 (framed under the MMRD Act 1957) every mine owner is required to submit the monthly, annual, explosive returns and various types of notices including opening and closing of the mines.  IBM is taking all out efforts for collection of data from mine owners by issuing reminder letter, fax and in certain cases contacting even on telephones. Besides, IBM has requested the Federation of Indian Mineral Industry (FIMI) to impress upon the mine owners to supply the data in time. Also the Inspecting officers of Regional Offices of IBM have been directed to monitor the receipt position of monthly data on production and impress upon the mine owners to supply the data within the due date during their inspection visit to the mines. Generally, the frame is revised annually but minor changes are done as and  when opening and closing notes are received; 
 
(iii)            So far as the data on minor minerals are concerned, all the States Directorate of Mining and Geology have been requested to supply the data on granite, marble and slate to IBM on monthly basis. Since Granite is an export oriented mineral, Department of mines constituted a ‘Granite Development Council’ under the Chairmanship of Joint Secretary, (Department of Mines). Department of Mines has also decided to circulate a proforma for collection of data on monthly basis. However to receive regular data on granite, it may take some more time;

Provisional Nature of the Index Series 

                                                            In order to achieve the norms of SDDS for release of IIP within six weeks, all the 15 source agencies are required to furnish data to CSO within four to five weeks from the reference month. As all the production data to be used in computing the index would not have become available at the time the index for any month is being prepared, the provisional index for a given month is compiled and released. This index is subsequently revised twice i.e. with the Quick Estimates of IIP for next month and the following third month.