Browse Publications Technical Papers 2018-01-1922
2018-10-30

Feedback on Application of MBSE Approach to an Avionics Subsystem 2018-01-1922

This paper provides feedback on using a modelling approach to define an avionics subsystem in the frame of SAE ARP4754A aerospace recommended practices. Feedback concerns the practical use of models to support functional part of the following processes: “requirements capture”, “requirements validation”, and top-level part of “development of system architecture”. A Model-Based Systems Engineering approach has been proposed with a set of modelling tasks concerning views (diagrams, tables), patterns and transformations, and model checking rules. The goal of the approach is to structure functional needs and guide systems engineers in identification and definition of system functional interfaces and of system top level functions. This paper provides returns of experience on the application of that new approach on an industrial avionic case study known as the Onboard Maintenance System by a team mainly used to document centric approach until recently. After some presentation of the pilot case used as experiment, some results are given and there is discussion on several points: the lessons learned during and after application of the MBSE approach to identify use cases, to define black box scenarios and to build the top level functional architecture. Paper provides comments about the approach (e.g. use cases granularity, modelling stop criterion, communication between systems), before starting the design. Then it discusses advantages and drawbacks that were measured during this modelling approach with regards to traditional document centric approach. Paper also provides the challenges identified for wider adoption in the company and the remaining points of attention when extending approach on larger project.

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