ISO 26262-3

Syside Derisker uses ISO 26262-3 library to support concept phase development of the road vehicles. It includes Hazard Analysis & Risk Assessment (HARA) and Functional Safety Concept.

Parse and Analyze HARA Items

Derisker extracts elements of HARA analysis from your SysML v2 model and automatically computes derived values like ASIL ratings. This eliminates manual calculations and ensures consistency across your analysis.

How to Parse

  1. Open Derisker panel (click in left sidebar)

  2. Enter the top level package name of your HARA model, e.g.

    Derisker_ISO26262-3_ExampleHARA

  3. Click Parse HARA

The parser automatically checks for any missing or incomplete elements of the HARA analysis and displays the items in editable table views.

Resulting Table Views

After a successful parse, the following table views are displayed:

  • HARA Results: A read-only table of the results of the HARA analysis. It displays all the elements of a specific hazardous event as well as its associated safety goal and safe states.

  • Malfunctions: An editable table view of the Malfunctioning Behaviours of the HARA analysis.

  • Hazards: An editable table view of the Hazards of the HARA analysis.

  • Operational Situations: An editable table view of the Operational Situations of the HARA analysis.

  • Hazardous Events: An editable table view of the hazardous events of the HARA analysis, automatically computing the resulting ASIL rating for each Hazardous Event.

  • Safety Goals: An editable table view of the Safety Goals of the HARA analysis, automatically computing the resulting ASIL rating based off of the associated Hazardous Events.

  • Functional Safety Requirements: An editable table view of the Functional Safety Requirements as well as any Functional Safety Subrequirements.

../../_images/hara_tableview.png

Attributes with associated values have a color map applied to them to help visualize the values.

Automatic Computations

Derisker computes derived values automatically:

  • ASIL (Hazardous Events): Resulting ASIL rating for each Hazardous Event

  • ASIL (Safety Goals): Resulting ASIL rating for each Safety Goal based on associated Hazardous Events

Work with Table Views

Review and edit HARA items in interactive tables with bidirectional synchronization to your SysML model. The HARA Results table is read-only (it is a computed result, not a single SysML element). The other table views are fully editable and allow new element creation; the SysML model is the source of truth. Attributes that are calculated automatically (such as rating_ASIL) are not editable.

Table Features

  • View and organize: Customize columns, sort by any field, select rows for navigation

  • Hide columns: Hide or show columns to tailor the view to your needs

  • Filter elements: Filter the table to only show elements that match a specific criteria

  • Edit properties: Editable cells range from text fields to drop-down menus; click Save Changes to write edits to the SysML model (validation runs automatically and errors are shown if invalid)

  • Navigate to source: Click Go to Source in the right-click context menu to jump to the definition of the element in your SysML file

  • Visualize Safety Goal Relationships: In HARA Results, use Visualize Safety Goal Relationships to visualize Safety Goals and Functional Safety Requirements relationships

  • Export CSV: Export the HARA Results table view to a CSV file

../../_images/hara_filtering.png

Visualize Safety Goals

Understand relationships between Safety Goals and Functional Safety Requirements with an interactive graph visualization.

How to Visualize

From the HARA Results table (one Hazardous Event):

  1. In the HARA Results table view, select or focus a row for a specific Hazardous Event

  2. Click Visualize Safety Goal Relationships from the context menu

From the sidebar (all relationships):

  1. Click Visualize Safety Requirements in the sidebar (available after HARA has been parsed)

  2. Graph opens showing all Safety Goals and Functional Safety Requirements relationships

../../_images/hara_visualization.png

Interact with the graph:

  • Navigate: Pan and zoom as needed

  • Explore nodes: Right-click any node for Go to Source (jump to element in SysML) or Go to Table View (jump to the table view row for that element)

  • Export: Click Export in the top right corner to save the graph as PNG or JPEG

Export Results

Share analysis results by exporting data or visualizations.

How to Export

Export HARA Results to CSV:

  1. In the HARA Results table view, use the export option to save to CSV

  2. Choose save location and filename

Export graph to image:

  1. In the Safety Goal / Safety Requirements graph view, click Export

  2. Select format (PNG or JPEG) and save location

  3. Image captures current graph layout and zoom level