This paper describes the use of the operator function model (OFM) to represent troubleshooting of printed circuit board assemblies. The model is potentially useful for understanding the troubleshooting process and providing the knowledge required by either a computer-based decision support system or an intelligent tutoring system. The model was derived from empirical data based on observations and concurrent protocols of troubleshooters. The ‘raw’ data were converted into cases. Based on analysis of the troubleshooting cases, an operator function model of troubleshooting was proposed. Model validation entailed comparison of model predicted troubleshooting with actual operator troubleshooting.
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