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Item type:Publication, Access status: with files , Simulation of database interactions for early validation of digitized enterprise processesDigitized enterprise processes often encompass interaction with relational databases. Describing and simulating large-scale and complex processes on different abstraction levels lead to the use of tools and methods of Model-based Systems Engineering. In practice, current entity-relationship modeling approaches solely enable modeling relational database structure without simulation of database interactions at an early development stage. However, in general, it is known that early validation improves common understanding and communication in the development team and reduces the risk of design flaws. This paper presents an approach for model-based enterprise process digitization and a previously developed and now enhanced broker-based SysML Toolbox for integrating real relational databases into SysML simulations. The approach comprises status quo documentation concerning enterprise processes, development of digitized processes and required relational database structures as well as validation of digitized processes using the SysML Toolbox.Publicationtype: Journal ArticleScopus© Citations 1 97 189 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Simulation of Ordering Processes across different Supply Chain Tiers in the Aviation Industry(2022-05); There is increasing concern that previous system development, characterized by the design of an isolated system with a limited number of interfaces to other systems, will be disadvantaged and have a detrimental effect on competition because recent rapid developments in the global supply chain have increased the need for digital services built on multiple interacting systems and their communication. Platforms are one of the most widely used services for sharing information by integrating multiple interacting systems into a network. The current platform integrates these systems with tight coupling to meet a new level of customer requirements.With the rapid increase in the information traffic along the global supply chain, many companies in the aviation industry have been confronting with these issues of processing and storing data within and across the enterprise. More and more companies are adopting an Enterprise Resource Planning (ERP) system which consists of a set of fully integrated modules to support a company's business processes that run from a single database. Nowadays, the database structure in the ERP system is customized for each company by external vendors. The aviation industry is characterized by a large network and long supply chains with the few Original Equipment Manufacturers (OEMs) and many suppliers (Tier 1, Tier 2, Tier 3). Individually created databases with own terms within the company make an intercompany exchange only possible with high effort.In this paper, we show how to model and simulate ordering processes across different supply chain tiers in the aviation industry rapidly to validate the use cases concerning the communication structure during a requirements-based engineering process.Publicationtype: Conference Paper44 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Model-based Development of a Federated Database Infrastructure to support the Usability of Cross-Domain Information Systems(2022-05); ; ; The Centre for the Study of Manuscript Cultures (CSMC) at the Universität Hamburg hosts a steadily growing number of autonomously developed databases. These databases often run in heterogeneous hardware and software environments and use different, project-specific data models. These conditions lead to a high degree of autonomy but to an increasing heterogeneity. The heterogeneity then leads to the problem that these databases cannot be easily merged into a federated database system (FDBS). In general, a FDBS integrates multiple autonomous database systems into a single FDBS. The challenge is now to merge multiple heterogeneous systems into one FDBS to provide successful federated searches. Here, the term successful means that the results of a search query are correctly and completely answered by all integrated domain-specific database systems. In addition to delivering correct and complete results from these queries, semantically and syntactically correct mappings of various database schemes must be ensured. We argue that at the faculty of the Humanities, a cross-domain use of autonomously developed databases offers added value in terms of data analysis and evaluation. Hence, the challenge that exists is to develop a suitable federated database infrastructure that supports the development of autonomous information systems, while heterogeneity does not increase. To meet this challenge, in IT projects in the defense sector and in the public administration of the federal government, the V-model is a mandatory procedural standard to develop IT systems systematically. When developing a cross-domain information system, special attention should be paid to the development of variants, i.e. the project-specific information systems, so that the extension of the federated infrastructure at the faculty is guaranteed and can be maintained in the long term. In the area of Model-based Systems Engineering (MBSE) variant modeling is a very current topic and no standard exists. However, there are some approaches that can be used, such as the method Variant Modeling with SysML (VAMOS). VAMOS is characterized by its ease of use to model variants and can be combined very well with other methods. In this paper we present a model-based approach to develop a federated database infrastructure for supporting the usability of a cross-domain information system. For the development of a federated database infrastructure we present how the V-model can be combined with the VAMOS method using the tool Cameo Systems Modeler for modeling and simulating in general, the broker-based SysML Toolbox for simulating database interactions, and the database management system Heurist for creating a cross-domain information system.Publicationtype: Conference Paper67 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , 68