The different stages of the survey ensure that the process meets the requirements for statistical production:
- stratified sample selection
- reminders and checks of data being collected
- clearance
- adjustment for total non-response
- shimming
- adjustment for partial non-response
- winsorisation (control of the influence of atypical units)
- the questionnaire was tested (in the 4th quarter 2012) as part of the survey's appearance before the label committee in early 2013.

The survey shows a decrease in response rate: 81.8% (86.3% in the previous edition) because of the interrogation about included current expenditure.

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

This year, the partial non-response rate is very higt for the variable RED_ASS_EPU. It stands at 22%.
This variable should therefore be analysed with caution, as a significant proportion of the responses have therefore been imputed.

The variables AU_TA and COTIS have a partial non-response rate relatively hight. It stands at 9.1 %.

The other variables all have a partial non-response rate of less than 6%.

In terms of precision, the main numerical variables have the following coefficients of variation:
Total amount of studies to protect the environment (TOT_ETUDE): 3.2%
Total amount of specific investments (IT): 2.6%.
Amount of integrated environmental protection investments (I2): 6.2%.
Amount of operating and maintenance of equipments dedicated to environnment (TD): 2,0%.
Amount of current expenditure to protect environment (TOT_DEP_COUR): 1,3%.

Accuracy degrades when one focuses on finer diffusion domains. In particular, the following sectors of activity have a coefficient of variation exceeding 30% and should be analysed with caution:

For (TOT_ETUDE)
Manufacture of vegetable and animal oils and fats
Grain processing; manufacture of starch products
Processing and preserving of fish, crustaceans and molluscs
Automotive industry
Manufacture of animal feed
Leather and Footwear Industry
Manufacture of bakery and pasta products

For (TI)
Manufacture of animal feed
Processing and preserving of fish, crustaceans and molluscs
Manufacture of bakery and pasta products
Clothing industry
Repair and installation of machinery and equipment
Leather and Footwear Industry
Manufacture of vegetable and animal oils and fats
Woodworking and manufacture of articles of wood and cork, except furniture; manufacture of articles of straw and plaiting materials

For variable TI, the overseas region (97) is in the same case.

For (I2) 
Leather and Footwear Industry 
Manufacture of animal feed
Clothing industry
Extraction Coking and refining
Grain processing; manufacture of starch products
Furniture manufacturing 
Processing and preserving of fish, crustaceans and molluscs
Fabrication de produits informatiques, électroniques et optiques

For variable I2, the overseas regions (97) and Corse (94) are in the same case.

For (TD)
Leather and Footwear Industry