Results of the DESC Test Facility's Efforts to Improve the Quality of Electronic Replacement Parts.

摘要

Test data evaluated to date shows that the quality of Defense Electronics Supply Center (DESC) managed stocks has been increasing dramatically. Early in the DESC test program Non-Mil lot rejection rates were nearing 50 percent for discrete semiconductors tested in receiving inspection. The associated part reject rate was nearly 15 percent. Today, the part reject rate for all Federal Supply Classes (FSCs) being sampled is less than 1 percent. Plans are in place and being implemented to drive the defect rate toward 100 PPM . This paper shows data indicating an increase in the quality of DESC sampled devices being supplied for the military service~ over the last few years. These improvements, in large part, can be credited to the efforts of the DESC Test Facility. Through continued testing and analysis we have built a data base that depicts the overall quality of the electronic parts DESC manages. DESC currently manages 93 Federal Supply Classes (FSCs) and the Test Facility performs incoming inspection on selected new buys, monitors and samples the material in storage, and performs support testing for DESC, DLA, and other Government agencies. The DESC Test Facility is continuing to expand both the number and types of devices selected for testing. Our test results serve to identify and correct deficient material before it is placed in inventory and monitors the quality of older devices already in storage. Rejected lots are returned to the manufacturers, corrective actions required, and future purchases of these same and similar part types screened. Feedback to suppliers and corrective actions are key ingredients to continuously improving the quality of electronic parts being received by DESC.