Sensitivity analysis of critical parameters in board test

The authors analyze the main contributors to the quality and cost of complex boards. With manufacturing data from Hewlett-Packard boards, they use simulation models to derive the sensitivity of quality and cost to the solder defect rate, the functional defect rate, and test coverage. They also give a simple cost estimate of implementing IEEE 1149.1 boundary scan on ASICs. Their new yield model, which accounts for solder defect clustering, provides highly accurate yield predictions.