The purpose of the indicator is to measure the change in volume of production, monitoring the performance of the industry. Production is defined as gross output value of industrial activities performed by enterprises classified to the industry, including performance of subcontractors. Non-industrial activities are not included. It covers sales of finished and intermediate industrial goods produced and services performed, excluding transactions within establishments of the same enterprise, and subsidiary production of the enterprise.
Adjustment is made for work in progress and for changes in stocks of finished products.
Consumption and value added taxes are not included, price supplements are accounted. The effect of price movement is eliminated using Producer Price Index. TE OR'98 conforms with ISIC Rev.3. and NACE Rev.1. TE OR'92 is harmonized with ISIC Rev. 3. and NACE Rev. 1. Enterprises having more than 49 employees, classified to the industry are observed by full-scope survey.