Continuity of a System Engineering Referential Repository Applied on an Aerospace Use Case

Bruno Vuillemin

doi:10.4271/2012-01-2142

A major challenge of a System Engineering approach lies in its ability to promote an efficient Process/Method/Tools environment that leads to an efficient and accurate System Referential Repository. The key factor is the definition of a centralized system referential repository that is shared by the various stakeholders involved in the success of industrial projects, including customers, system architects, hardware and software development suppliers, validation and safety teams.

This paper describes the development of a use case modeled with the most appropriate tool-chain that fulfills the above System Engineering expectations.

Based on standard documents (INCOSE Handbook, ARP4754) and on experience achieved by the development of many System Engineering projects, a methodological approach is defined. This approach includes the complete process from textual requirements, to operational description, to functional breakdown, to technical architecture, and finally to certified software generated from models.

An aerospace use case is selected that covers the main steps of this System Engineering approach.

Based on an existing benchmark framework that includes cartography of tools, criteria, test means and use cases of several System Engineering tools, the SCADE® tool chain is selected because it offers an appropriate solution for the approach. The main tool that is used is SCADE System, which is suited for the System Engineering steps of the approach, including operational and functional analysis, architecture definition and allocation. Several graphical views of the Use Case, including subsystem parts, are developed for operations, functions, interfaces, components, all using a subset of the SysML standard (IBDs and BDDs diagrams) that is embedded into SCADE System.

The SCADE Suite tool, for control logic and algorithm design, is also used for the modeling of some parts of the software behavior. The consistency checks and traceability links applied to the several layers of information embedded into the System Referential Repository are provided by the SCADE tool-chain.

As demonstrated by the Use Case, SCADE System is tailored to the main requirements of the System Engineering process. SCADE System's graphical representation facilitates the communication among all of the teams. A System Referential Repository is built that is continuously used and enriched by all of the project stakeholders in the course of the development.

Next step consists of improving some other System Engineering key tasks, such as modeling and simulation of a sequence of operations and functions, discrete modeling and simulation (state/event/transition) for the behavior of functions, continuous modeling and simulation for the behavior of the component of the product architecture, and support for the safety analysis based on FMEA generated from model.

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Continuity of a System Engineering Referential Repository Applied on an Aerospace Use Case 2012-01-2142

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