Railway

EN 50129 Safety Case

Veröffentlicht Veröffentlicht in Englische Blogs, Railway

The EN 50129 safety case is the structured and documented safety statement that the conditions for safety acceptance have been fulfilled. The safety case includes all safety-relevant aspects of the product life cycle. When creating the document, the challenge is therefore to present a wide range of information in a clear and comprehensible manner. EN […]

ISO26262

ISO 21448 – Safety of the Intended Functionality (SOTIF) Why is it required?

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The ISO 21448 Safety of the Intended Functionality defines methods for failure resulting from the limitation of a functionality. ISO 26262 deals with concepts, procedures and measures for failures resulting from random hardware failures or systematic HW/SW failures. Many experts see the SOTIF standard as a normative support for the realization of autonomous driving. This […]

Other FuSa Standards

ISO 25119: Software Development for Tractors and Machinery for agriculture and forestry

Veröffentlicht Veröffentlicht in Englische Blogs, Other FuSaNorms

ISO 25119: The norm describes the safety requirements for tractors and machinery for agriculture and forestry. The standard is a sector specific implementation of IEC 61508 and consists of 4 parts. Like other functional safety standards, ISO 25119 specifies various levels of criticality. The standard defines the Agricultural Performance Level (AgPL) QM, a – e. […]

Functional Safety

Requirement completeness using data- and control flow analysis

Veröffentlicht Veröffentlicht in Englische Blogs, Functional Safety

Carrying out a data- and control flow analysis is required in almost all functional safety standards (ISO 26262-6 Table 7 Measures 1f/g, DO 178C Table A-7 Measure 8 and EN 50128, EN 50657Table A19 Measures3/4). In comparison to other measures, the data and control flow analysis causes a lot of questions, when it comes to […]

Functional Safety

The non-intrusive measurement of structural coverage!

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The measurement of structural source code coverage is nowadays defined as an important procedure in many functional safety standards. The non-intrusive measurement of structural coverage offers completely new possibilities in the future. For a long time, it was industry-wide consensus that structural coverage should and could only be determined in so-called white-box tests. In many […]

Functional Safety

Functional safety and pragmatism is that possible?

Veröffentlicht Schreibe einen KommentarVeröffentlicht in Englische Blogs, Functional Safety

Many people associate with the implementation of functional safety, a lot of formalism, and unnecessarily extensive documentation and many processes with a high proportion of theoretical framework. And yes, such projects are existing very often and in every industry. My experience shows that such projects are not very powerful when measured by the real implementation […]

Requirement Engineering theory

Requirement Engineering – Aspects which even not considerd in theory!

Veröffentlicht Schreibe einen KommentarVeröffentlicht in Englische Blogs, Requirements Engineering eng

Requirement Engineering theory: In most of the requirement engineering publications, the focus is on management aspects. The collection and management of requirements is discussed extensively. In the following blog I discuss important aspects which are not sufficiently considered in the RE theory. I start with the definition of Requirement Engineering in the book „Requirements Engineering […]

Functional Safety

Compiler for safety critical software – What needs to be done?

Veröffentlicht 1 KommentarVeröffentlicht in Englische Blogs, Functional Safety

The compiler is the central „tool“, which is required for every software development. It forms the link between the human-readable high-level source code (e.g., C and C ++) and the machine code, interpretable for the hardware processor. For the development of safety critical software according to relevant functional safety standards special requirements apply for the tools […]

Functional Safety

Freedom from Interference – The practice in Industry!

Veröffentlicht 2 KommentareVeröffentlicht in Englische Blogs, Functional Safety

In the blog post ISO26262: Freedom from interference – What is that?, I explained the principle of Freedom from Interference. The example used was based on the automotive industry and the ISO 26262. Now I would like to consider Freedom from Interference with respect to the industry sectors railway, aviation and automotive and share my […]

Functional Safety

Challenges when determining the structural source code coverage on the target!

Veröffentlicht Schreibe einen KommentarVeröffentlicht in Englische Blogs, Functional Safety

Structural Coverage Target: The proof of a 100% structural source code coverage is required by almost all functional safety standards (IEC61508, ISO26262, DO 178C, etc.). In the individual SIL / ASIL levels, only the type of source code coverage is differentiated. Essentially, the Statement Coverage (low SIL / ASIL Level), the Branch Coverage and the […]