...
5.13. The SBR also serves as the basis for grossing up the results from the surveys to produce estimates for the entire business population, and it is the main source for data on business populations and their demographics. An SBR should preferably cover as much national economic activity as possible. However, the high cost-to-benefit ratio involved in covering the smallest units means that some sort of cut-off is usually applied in practice. In addition to its role as a sampling frame, a high-quality[1] SBR can also improve the efficiency of the national statistical system by coordinating and spreading the samples of the various statistical surveys, helping to reduce the response burden and improving the coverage and congruence of the survey results. Finally, a comprehensive and up-to-date SBR plays a central role in achieving the integration of economic statistics, and is essential for the full coordination of source data that use the same basic information about business units.[2]
Next: B.3. Characteristics of a statistical business register
...
[1] Overall quality is not easy to measure, although several of its specific aspects can be used as indicators, e.g., coverage, accuracy of the data held, frequency of updates and consistency of processes (see also chapter 20).
[2] See Guidelines on Integrated Economic Statistics, para. 3.29.