This paper describes an ergonomic auditing software system, one of the tools used for performance enhancement of aircraft inspectors. This tool was developed at Galaxy Scientific Corporation, in cooperation with the State University of New York at Buffalo, for the Federal Aviation Administration (FAA). The purpose of the development task was to integrate a variety of ergonomic audit tools into a comprehensive package. This ergonomic auditing system called “ERgoNomic Assessment Program” (or ERNAP), carries out an ergonomic evaluation for maintenance and inspection operations. ERNAP can also be used to help designers build ergonomically efficient procedures and systems. ERNAP evaluates existing/proposed tasks and setups in the application of human factors/ergonomic principles, and suggests ergonomic interventions. The package consists of a user interface, an inference engine, a printing module, and a reference database. The user interface supports user learning, helps guide the user through the steps, describes the less familiar ergonomic principles, allows the user to access on-line help, and is simple to use. The inference engine evaluates the user inputs based on the reference database and different models of analysis. This package maintains consistency with the Human Factors Guide for Aviation Maintenance which is reported within this session.