Local kind-of-activity units and industries

1.29 Most institutional units in their capacity as producers carry out more than one activity; to emphasise relationships of a technico-economic kind, they have to be partitioned with regard to the type of activity.

Local kind-of-activity units are intended to meet this requirement as an operational approach. A local KAU groups all the parts of an institutional unit in its capacity as producer which are located in a single or closely located sites, and which contribute to the performance of an activity at the class level (4 digits) of the NACE rev. 1.

In principle, as many local kind-of-activity units must be registered as there are secondary activities; however, if the accounting documents that would be necessary to describe such activities are not available, a local kind-of-activity unit may include one or several secondary activities.

The group of all local KAUs engaged on the same, or similar, kind-of-activity constitutes an industry.

There is a hierarchical relationship between institutional units and local KAUs. An institutional unit contains one or more entire local KAUs; a local KAU belongs to one and only one institutional unit.

For more refined analysis of the production process, use is made of an analytical unit of production. This unit, which is not observable (except in the case of a local KAU only producing one type of product), is the unit of homogeneous production, defined as covering no secondary activities. Groupings of these units constitute homogeneous branches.