The different stages of the survey ensure that the process meets the requirements for statistical production:           
- stratified sampling
- reminders and controls of data being collected
- data cleaning
- correction of overall non-response
- calibration
- correction of partial non-response
- the questionnaire was tested in 2013 upstream of the collection, with 97 establishments.

The survey shows a declining response rate: 80.4% (88.8% in the previous edition due to the additional sample surveyed in 2016). The latter implied a higher sampling rate in small groups, where the response rate is always lower.

Before any exploitation, it is also useful to assess the quality of the variables through their partial non-response rate and confidence intervals provided in the survey quality indicators.