Worst case circuit analysis-an overview (electronic parts/circuits tolerance analysis)

This paper has been prepared utilizing material from Design and Evaluation, Inc.'s (D&E) training course and engineering handbooks on worst case circuit analysis (WCCA). The WCCA training course was developed by D&E and upgraded under contract to NASA's Jet Propulsion Laboratory to standardize an approach to performing worst case circuit analysis and to exemplify the methodologies and tools for completing a customer acceptable worst case circuit analysis final report. The WCCA methodologies discussed herein for the development of a worst case parts variation database, sensitivity analysis and the mathematical approaches of the extreme value analysis (EVA), root-sum-square (RSS) and Monte Carlo analysis for solving circuit equations and combining variables have become an accepted industry standard over the last eight years.