This volume is the first comprehensive analysis of a number of on-site test inspections which have been conducted in the chemical industry. These inspections were conducted in order to design and test the verification mechanisms for a future international Chemical Weapons Convention (CWC). Conclusions are drawn from these experiences about the manner in which such inspection could be conducted in future, problems encountered in the inspection process are described, and suggestions are made how the verification system of the CWC might be finalized so as to function most efficiently. Information is also presented which will broaden understanding of how such inspections will be conducted, what their limits will be and how the concerns of the chemical industry can be addressed.