data- and control flow

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 […]

The non-intrusive measurement of structural coverage

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 […]

pragmatic software development

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 […]

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 […]

Freedom of Interference

Freedom from Interference – The practice in Industry!

Veröffentlicht 2 KommentareVeröffentlicht in Englische Blogs, Functional Safety

In the last blog (June 2017), I explained the principle of Freedom from Interference. The example used was based on the automotive industry and the ISO26262. Now I would like to consider Freedom from Interference with respect to the industry sectors railway, aviation and automotive and share my industry experiences with you.

strukturellen Source Code Überdeckung

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

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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 MC / DC […]

Safety Development Process

Good safety development process – What is it?

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IEC 61508, ISO26262, DO 178C, ISO 25119: Have you ever encountered these abbreviations in your professional life? If so, there is a high probability that you are already implementing functional safety projects in your company or that you are entering the market in the near future. Perhaps you have already made the experience, or at […]

Importance of Tool Qualification

Importance of Tool Qualification in the FuSa (part 1)!

Veröffentlicht 1 KommentarVeröffentlicht in Englische Blogs, Functional Safety

Importance of Tool Qualification : Many companies and project teams that carry out projects for the first time in the field of functional safety have the impression that the tool qualification is critical to success and involves a great deal of effort. Although the Importance of Tool Qualification is justified, the subject is interestingly often […]

Structural source code coverage and Requirements – Is there any dependency?

Veröffentlicht Schreibe einen KommentarVeröffentlicht in Englische Blogs, Functional Safety, Requirements Engineering eng, Validation and Verification

If you are newly engaged in the area of functional safety, then you will encounter fairly quickly the terms “structural source code coverage” and “requirements”. The specification of technical systems by requirements is, of course, also common in non-safety-critical areas. By contrast, the subject structural source code coverage is almost unknown outside safety-critical projects. In […]