3-8 Functional Safety Concept

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According to ISO26262:

Objectives

The objective of the functional safety concept is to derive the functional safety requirements, from the safety goals, and to allocate them to the preliminary architectural elements of the item, or to external measures.


During this phase the foundation of the safety architecture is going to be defined. This architecture will frequently be subjected to change. Therefore it is advised to start designing using a regular white-board and make pictures for documentation. Once the architecture has matured enough, it could be documented using either conventional drawing techniques or a modeling tool. Using a modeling tool like Enterprise Architect requires quite a lot of time and experience. For complex, big projects the time and effort to set up such a model will be rewarded later on in the project. However for small, less complex projects the amount of time and effort required might not relate to the time and effort being put in to initial product development.


In short the Functional Safety Concept consists of:

  • Definition of the functional safety requirements
  • Allocation of safety requirements to functional elements
  • Determination of a preliminary safety architecture
  • Verification of the Functional Safety Concept


Work Products:

  • Functional Safety Concept
  • Verification report of the Functional Safety Concept


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