The article describes a simplified ISO 26262 meta model as well as breaks it down into its core sections. 

While the FMEA and FTA models are hard-coded, the rest of the ISO 26262 meta model is configurable. Our recommendation, however, is to use the SIDs presented in this article for the configurable parts of ISO 26262.


ISO 26262 Meta Model

This meta model graph displays an example of the main building blocks of our ISO 26262 solution. In the article, we are structuring everything under a "Safety Analysis" item type. The alternative to this is to have the ISO 26262 solution integrated more to the product structure. A more extended model is available by contacting support@systemite.se.


(Click on the image to zoom in.)


The Analysis area (12FA) is broken down into the following core parts:

  • Hazard Analysis Area (HARA)
  • Functional Safety Concept
  • Technical Safety Concept


Hazard Analysis and Risk Assessment (HARA)

The HARA analysis area is where much of the safety and quality work and data is gathered.


Functional Safety Concept



Technical Safety Concept



GSN

Views Supporting Safety Analysis Work 

FTA and FMEA

The aim of safety analysis work is to ensure that there are no violations of safety goals. ISO 26262 recommends two methods of safety analysis - deductive analysis and inductive analysis. 


The SystemWeaver swExplorer provides users with the views needed to complete the analysis: 

  • The Failure Mode and Effects Analysis (FMEA) view and project for deductive analysis (a top-down approach) (Described in the application Help)
  • The Fault Tree Analysis (FTA) view for inductive analysis: (a bottom-up approach)

  • The Hazard Identification views for hazard, hazardous event and safety goal identification


For an overview of the FTA, FMEA, and HARA meta models and view configurations, see:

Configurable Graphs, Grids, and Charts

Further training material covering configuration of grids and reports can be found in Configuring Item Views.