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Requirement Engineering – Aspects which even not considerd in theory!

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 Fundamentals” (Klaus Pohl, Chris Rupp). Read more

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

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 used during the development. (Refer to tool qualification blog 1 and blog 2) Such functional safety standards are ISO26262 (car), EN50128 (rail), IEC61508 (automation, general) or DO178C (aerospace).  The compiler plays a special role here. On the one hand, it is the central tool for any development. On the other hand, the measures proposed in the standards can not be fully applied in practice. The blog shows a process from the aerospace industry how to use compiler for safety critical systems. This process can highly be recommended for other industries. Read more

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Good safety development process – What is it?

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 least, heard of the fact that especially software projects in the field of functional safety can only be carried out with very high documentation / test effort. The safety development process requires this effort. In addition, such projects are very rigid, inefficient, and inflexible. Is such an argument or experience known to you? Read more

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Specification Architecture Requirement in IEC 61508; Is there any difference?

Specification Architecture Requirement : For an increasing number of systems in the industrial automation functional safety requirements must be fulfilled. The IEC 61508 compliance must be demonstrated for the software development.
On the other hand, there are commercial requirements which often severely limit the product development budget.
The solution lies in an efficient development process that meets the safety-relevant requirements. A prerequisite for a successful implementation of such a process is a deep understanding of the standard and a clear definition of used terms. In the following blog, I discuss the three terms Specification Architecture Requirement. Read more

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