Case Study
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Case Study
"Ansys medini analyze helped us to provide functional safety analysis for hardware, software and systems based on and fully compliant to architecture models.”
—Günter Gäbelein, Safety Assessor, ZF Friedrichshafen AG
According to Günter Gäbelein, Safety Assessor at ZF Friedrichshafen AG, “As a systems supplier for passenger cars, commercial vehicles, and industrial technology, ZF Friedrichshafen AG places great emphasis on agility and innovation. To support exciting developments like autonomous driving and electric mobility, our R&D process must be fast, cost effective, and technically precise. More and more projects are taking advantage of synergies provided by medini analyze. In a medium-size project, more than 300 hours of effort can be saved by the one-tool solution and the interfaces to third-party tools for architectures. ZF is a strong advocate for model-based engineering, and medini analyze helps to reduce the complexity of analysis for embedded systems."
The global automotive industry continuously pushes to improve its time to market and reduce its costs while meeting functional safety demands. Embedded systems from automotive suppliers must be capable of operating reliably and safely under challenging environmental conditions. Since 2014, ZF has been a pioneer in applying medini analyze to its functional safety engineering practices, delivering significant benefits in terms of consistency and completeness of work products. In the past different tools were used for failure modes and effects analysis (FMEA), fault tree analysis (FTA), and hardware fault metric analysis, and the consistency between architecture models and the analyses was always a time-consuming challenge.
In the past, ZF product lines were using different standards for failure rates and modes. Therefore, the comparison of designs was difficult, although similar designs were used.
Tool classification and qualification according to ISO-26262 seem to be a challenge in every project worldwide. Although the topic “Confidence in the Use of Software Tools” is well described in ISO 26262-8:2018, project teams often do not know what to do. In most projects, the classification of software tools is based on reuse from source projects and lessons learned and are therefore well done. However, according to the qualification of software tools, evidence that measures from tool qualification have been performed is often missing.
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