The founder of Coastal Flow Measurement, Jerry Fillman, authored a paper entitled “Chart Auditing: Another Perspective” in 1984. Then, as now, the relationship between buyers and sellers of natural gas, the various sources of measurement error, and the establishment of more stringent standards for orifice chart measurement are subjects for concern. While the measurement industry has seen considerable progress in the past 20 years, chart auditing has changed little. The purpose of this paper is to discuss the process of chart auditing from a more contemporary perspective