CSD&M : Day 2

We offer feedback on the implementation of enterprise architecture as part of a digital transformation. The major issues were:
• master the complexity of systems,
• define the integration of a complete system from on-board to the information system
• apply the CESAMES framework with a modeling language
• ensure simultaneous co-construction of cross-functional architectures between the business/system and the IS
• make the link between the architecture and execution of Agile projects at scale: SAFe.

This paper presents a status of the deployment of the MBSE at Ariane group. By MBSE, we mean the digitalization of Systems Engineering. It will be illustrated with some applications on the Ariane 6 program. In this paper, we will focus on the following MBSE uses : CONOPS, architectures, and engineering data management. We will first identify the challenges of the development of an heavy launcher program like Ariane 6, that can benefit from the deployment of MBSE, but also which makes it a challenge to deploy. Then we will present some achievements we reached and difficulties we indeed faced. We will conclude with a status on other uses of MBSE on-going at AGS.

The 2018 Digital Engineering strategy from the US Department of Defense laid out a plan for digital engineering adoption, focusing on model-based methods for complex system design. While current practices meet some DoD objectives, there’s room for improvement in ensuring model trust through verification. This study demonstrates behavioral verification using model checking, SysML model transformation, and an abstraction technique to scale up for larger systems. Verification via a heat pipe case study showed the effectiveness of model checking and abstraction in ensuring system model compliance with specifications.

The method proposed in this paper is mainly based on Eclipse GLSP architecture. Firstly, the main part of the tool supporting SysML basic modeling ability in Web environment is designed and implemented, and the server, the client and the interface communication of end to end are designed and implemented in detail. In order to improve the tool’s support for SysML model persistence, this paper designs and implements an extensible model persistence scheme that supports multiple data sources, and gives the model mapping relationship between relational database and graph database respectively. At present, this method has implemented a SysML modeling tool, AVIC Digital ModSim which is under Web environment. AVIC Digital ModSim supports basic SysML modeling operations, which has a data sources switchable model persistence solution and supports multi-user collaborative modeling.

Nowadays, complex systems in industries such as aerospace, railway, or automotive are developed through Model-Based Systems Engineering (MBSE). This methodology results in the creation of numerous interlinked development artifacts. However, projects often undergo similar cycles and generate similar artifacts, leading to redundant efforts across different lifecycle phases and different projects. This redundancy can be reduced if development artifacts are reused in multiple projects and various lifecycle phases. This work focuses on the reuse of library elements in both SysML models for specification purposes and simulation models and the reuse of architectures specified in SysML to create simulation models efficiently. To make such a reuse possible, a concept is developed. For this reason, the research explores the extent to which Product Line Engineering (PLE) methods can be applied to generate efficiently various architectures reusing the components of the asset library and to compare the architectures by performing simulations. To demonstrate its validity, the proposed concept is applied in an industrial context.

Nowadays, complex systems in industries such as aerospace, railway, or automotive are developed through Model-Based Systems Engineering (MBSE). This methodology results in the creation of numerous interlinked development artifacts. However, projects often undergo similar cycles and generate similar artifacts, leading to redundant efforts across different lifecycle phases and different projects. This redundancy can be reduced if development artifacts are reused in multiple projects and various lifecycle phases. This work focuses on the reuse of library elements in both SysML models for specification purposes and simulation models and the reuse of architectures specified in SysML to create simulation models efficiently. To make such a reuse possible, a concept is developed. For this reason, the research explores the extent to which Product Line Engineering (PLE) methods can be applied to generate efficiently various architectures reusing the components of the asset library and to compare the architectures by performing simulations. To demonstrate its validity, the proposed concept is applied in an industrial context.

In organizations manufacturing complex systems, design decisions serve as the basis for overall system development. These design decisions span across the organization’s entire portfolio, incorporating many different decision factors covering market drivers to product component selection, which makes these decisions complex and multifaceted. In view of making informed decisions, a comprehensive understanding of these influencing decision factors is required. Currently there are very few works available presenting a comprehensive list of factors and none of them presents a model that closely depicts the decision situation in practice. Additionally, available models lack explicit guidance for navigating such situations. To address this, we identify the different decision factors influencing design decisions at the portfolio level and model them to support making informed decisions. These decision factors are identified via a case from a hi-tech company in The Netherlands and the model is presented from the viewpoint of the decision maker (typically a Systems Engineer (SE)) and also as that of a researcher aiming to analyze such situations.

High-tech system design is filled with decisions of high uncertainty and complexity, making balancing and trade-offs difficult, and possibly leading to rework and high costs. This work is part of a project aimed at improving decision- making in systems engineering in the context of high-tech industry and looks at the factors important for the quality of decisions. We conducted a survey in which 93 respondents ranked predefined factors from previous discussions, added missing factors, and removed those that they thought irrelevant. All respondents were experts from a company specialized in semiconductor manufacturing equipment from the Netherlands. We defined 12 categories of factors based on the survey results. Experts think that quality decision-making necessitates alignment with all of the decision’s internal and external stakeholders, and benefits most from knowledge about the system. We show that systems engineering decision-making can be approached similarly to business and operations decisions, but requires a different focus.