1. Questionnaire based on ISO/IEC 17025:2005 + Data and Metadata QA/QC EMODNet Chemistry collects data and a complete set of metadata, including information on collection methods and on quality checks. All this information is entered in the distributed data management infrastrucute.

2. data extraction Regional data buffers Questionnaire based on ISO/IEC 17025:2005 + Data and Metadata QA/QC Data and metadata are internally extracted by a robot harvester properly configured in Regional Data Buffers.

3. data extraction Regional data buffers Data aggregation data QC with ODV Correlation of params Regional data buffers QCd data buffers Questionnaire based on ISO/IEC 17025:2005 + Data and Metadata QA/QC Regional Leaders perform data aggregation, with unit conversions and a regional Quality Control based on a common protocol. As a result, quality checked Regional Data Buffers are obtained for the products generation.

4. data extraction Regional data buffers Data aggregation data QC with ODV Correlation of params Regional data buffers QCd data buffers Report errors to the data originators Questionnaire based on ISO/IEC 17025:2005 + Data and Metadata QA/QC Regional Leaders report errors or anomalies encountered to data originators.

5. data extraction Regional data buffers Data aggregation data QC with ODV Correlation of params Regional data buffers QCd data buffers Report errors to the data originators Update the official copy of data Questionnaire based on ISO/IEC 17025:2005 + Data and Metadata QA/QC As a result, the official copy of the data available from the distributed infrastructure is updated.

6. data extraction Regional data buffers Data aggregation data QC with ODV Correlation of params Regional data buffers QCd data buffers Report errors to the data originators Update the official copy of data Feedback loop for data quality upgrade Questionnaire based on ISO/IEC 17025:2005 + Data and Metadata QA/QC This feedback loop guarantees a continuous data quality upgrade

7. data extraction Regional data buffers Data aggregation data QC with ODV Correlation of params Regional data buffers QCd data buffers Report errors to the data originators Update the official copy of data Feedback loop for data quality upgrade Questionnaire based on ISO/IEC 17025:2005 + Data and Metadata QA/QC