Changes in the economy, as well as continuous technological development, result in the creation of new activities and products that can replace existing activities and products. Such changes that occur in society present a constant challenge for the creation of statistical classifications. Any revision of the classification, especially if it involves structural changes, leads to breaks in time series.
Revisions apply to all classifications of the integrated system of economic classifications. The main criteria for initiating a revision are the following:
- relevance to the current world economy,
- better comparability with other national and international classifications and
- continuity with its previous versions.
