Members of the Forensics Professional Group are interested in all aspects of human factors as applied to litigation matters, both civil and criminal. FPGs goal is to bring ergonomic data and approaches to the investigation of losses influenced by design or by human limitations. Arguments may be presented on the degree to which a design meets current standards and known limitations and capabilities of the prospective users. The features and provisions for safety, instructions, and foreseeable misuses are also examined. The role of the expert witness in the judicial process differs from that of the ordinary witness in that an expert may give opinion testimony based on specialized knowledge and training, while a ordinary witness is restricted to specific information experienced or observed concerning the event under consideration. Anyone with knowledge in an area of practice well beyond that likely in a jury member may be declared by the Court to be an expert witness. However, an expert’s credentials are often important to judges and juries in their evaluation of whether the witness is qualified as an expert. Human factors/ergonomics professionals are often uniquely qualified to evaluate the interactions of people with machines and procedures. They are well prepared to apply the scientific data on operator performance in practical operating settings.