Track 2 Session 1

Despite having a black epoxy coating on the surface of the trimmable resistors, the trimmable resistors were cracking and that resulted in product anomalies. These trimmable resistors were cracking without a trend. With the use of Weibull++, the product anomaly data was statistically fitted to a distribution. Various experiments were conducted to quantify the best solution. Weibull++ was used to quantify the failure rate for the various experiments at various time intervals. With the results from Weibull++ and the experiments conducted, a permanent solution was selected. The selection criteria were: Expected number of failures over time, Cost of solution, Ease of Implementation, Experience of process and predicted cost of warranty.