The Functional Hazard Analysis (FHA) module allows to define Failure Conditions, Functional Failures and Failures Modes and link these safety features to system components and functions. The proposed implementation has been specifically designed to fit the FHA as prescribed in aerospace standards (see also ARP-4761) to the Capella/Arcadia framework.
The following picture presents the metamodel implented in ATICA4CAPELLA and the association relationships between the safety features and the Capella elements across the different layers of the systems engineering process:
After activation, a folder named "MBSA Package" shall appear under
System Analysis. Then, create a new
System Architecture Blank diagram, activate the safety perspective (on the upper bar in the diagram) and the
Failure Condition creator will appear in the diagram creator palette.
For more info about how to install and activate the plugin, check this link.
Creation of failure conditions and association to model elements
Starting from the
System Architecture Blank (SAB), failure conditions could be created using the diagram palette. Select a
Failure Condition and drag and drop the element into a
Failure Condition properties (such as failure effect and severity) using the contextual menu (double click on the
Failure Condition element).
Functional Hazard Analysis
The FHA is created automatically, retrieving all
Failure Conditions associated to
System Functions in the model.
To create the FHA, click on
System Analysis ->
New diagram / table -> FHA