|Unit||Index 2015=100, NSA|
|Adjustments||Not Seasonally Adjusted|
For Switzerland, the industrial production index (IPI) measures change in deflated turnover or physical output (i.e., a volume index) by producer units (establishments). Quarterly from 1990.
The source classifies industrial activities by NACE-Rev.1 Activity coverage includes Mining and quarrying, manufacturing, and production and distribution of energy and water.
Geographic coverage includes the whole country.
Production is measured by deflated monetary values and by physical quantites. For manufacturing industries, 10% of production is measured by physical quantites and 90% by deflated turnover. For mining all information is expressed in physical quantities. In construction, hours worked are used.
Unit selection: Data collection is based on a sample drawn among establishments employing 5 persons or more.
Sample size: 7000 surveyed establishments. Approximately 4500 establishments of which are directly surveyed by the Swiss FSO. About 2500 establishments are surveyed indirectly through trade associations or administrative sources.
Data collection methods: Mail questionnaires.
The source requests answer from establishments until a sufficient number of ovservations are obtained.