Combining Fault Analysis Technologies for ISO26262 Functional Safety Verification

Abstract

The development of Integrated Circuits for the Automotive sector imposes in complex challenges. ISO26262 Functional Safety requirements entail extensive Fault Injection campaigns and complex analysis for the evaluation of deployed Software Tools. This paper proposes a methodology to improve Fault Analysis Tools Confidence Level (TCL) by detecting errors in the classification of faults. By combining the strengths of Automatic Test Pattern Generators (ATPG), Formal Methods and Fault Injection Simulators we are able to automatically generate a Test Environment that enables the validation of the tools and provide supplementary information about the design behavior. Our results showed fault detection rates above 99% including information to improve ISO26262 metrics calculation.

Design of a Testing Tool Based on Fault Injection for Functional Safety

“…The standard covers the life cycle of automotive systems and provides a basis for product development testing based on the V-model, encompassing the concept phase and system design (software and hardware levels) [2]. Fault injection testing (FIT) [3,4], as a recommended testing method in various stages, injects potential faults into the system under test to detect whether there are failure risks under fault conditions, thereby verifying the effectiveness of the system's safety mechanisms. However, in the actual vehicle validation and verification testing process, there are issues such as complex operations and cumbersome procedures.…”