This International Standard specifies additional test methods for routine analytical cigarette-smoking machines intended to check the conformity of these machines with ISO 3308:2012, Clause 4. It only establishes additional test methods for smoking machines and does not deal with actual smoking, which is described in other International Standards. It is composed of three sections relating to: — the determination of pressure drop (Clause 4); — the determination of significant puff profile parameters (Clause 5); — the verification of restricted smoking (Clause 6). NOTE There are more possibilities to determine the aforementioned parameters. Systems giving the same results and accuracies can be used. The certificate of compliance with this International Standard may be obtained from machine manufacturer. The frequency to carry out these additional test methods for smoking machines' verification is not part of the scope of this International Standard.