Effectiveness and Suitability of the Automotive EHPS Software Reliability and Testing

Abstract

The effectiveness and suitability for the reliability and test of the embedded software of the automotive EHPS (Electrical Hydraulic Power Steering) pump are extensively explored in this paper. The Crow-AMSAA analysis has been applied to evaluate the embedded software reliability growth based on the failure data collected in the prototype phase and in the field. The slope β of the Crow-AMSAA plot is smaller than 1 which indicates that the reliability of the embedded software is increasing and failure rate is decreasing. The field performance and reliability of the embedded software, which is the key indicator to evaluate the effectiveness and suitability of the reliability management and testing methods used in design and development, are also summarized in this paper. Using the real field and zero mileage data to evaluate the effectiveness and suitability of DFR (Design for Reliability) is also beneficial for the company to make the continuous improvement for the future embedded system/software design and development.