Since 2006, the CORESTA Cigar Smoking Methods Sub-Group conducts periodic collaborative studies in order to improve repeatability and reproducibility measurement methods of different cigar sizes and types.

The purpose of the 2017 13^th Collaborative Study (CS) was to re-establish mean values for NFDPM, nicotine and carbon monoxide for different sizes and types of cigar products and test pieces and to provide a tool for participating laboratories to prove competence in cigar smoke analysis.

It is planned to repeat the study on an annual basis.