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Discrete Event Simulation (DES) is a well-known approach to simulate production environments. However it was rarely used for operative planning processes and to our knowledge never in terms of multiple disposition levels.In this paper we develop the necessary adjustments to use DES for this purpose and show some theoretical advantages.
The complexity and volatility of companies’ environment increase the relevance of disruption preparation. Resilience enables companies to deal with disruptions, reduce their impact and ensure competitiveness. Especially in the context of procurement, disruptions can cause major challenges while resilience contributes to ensuring material availability. Even though past disruptions have posed various challenges and companies have recognized the need to increase resilience, resilience is often not designed systematically. One major challenge is the number of potential measures to increase resilience. The systematic design of resilience thus requires a detailed understanding of domain-specific measures. This also includes an understanding of the contribution of these measures to different resilience components and their interdependencies. This paper proposes a systematic approach for configuring resilience in procurement which enables the evaluation and selection of resilience measures. Based on a resilience framework, a resilience configurator is developed. The basis of the configurator are resilience potentials that have been characterized and clustered. Overarching approaches to design resilience and indicators to evaluate resilience are presented. Moreover, a procedure is proposed to ensure practical applicability. To evaluate the results two case studies are conducted. The results enable companies to systematically design their resilience in procurement.
Numerous traditional, agile and hybrid development approaches have been proposed for the development of CPS. As the choice of development process is crucial to the success of development projects, it has become a major challenge to identify the best-suited process. This paper introduces a methodology for identifying the best-suited CPS development process, based on the individual boundary conditions for a certain development project within a company. The authors used a set of eight indicators to assess a CPS-development project. The results of the assessment were matched with CPS-development approaches. Based on the matching results a best-suited development process was selected. The application is shown for a use case in the German manufacturing industry. The developed method aims to reduce the risk of project failure due to the wrong choice of development process.
Die Herausforderungen der Zukunft werden geprägt durch digital veredelte Produkte von höchster Qualität und hoher Variantenvielfalt bei gleichzeitig kleiner werdenden Losgrößen. Konventionelle Entwicklungsmethoden stoßen aufgrund zunehmender Komplexität und kürzer werdender Lebenszyklen auf Produktebene an ihre Grenzen. Dadurch werden bei kundenindividueller Produktion die Aufwände in der Arbeitsplanung und -vorbereitung überproportional größer. Eine mögliche Lösung stellt die generative Erstellung der Produktionsstückliste während der Montage dar. Durch das eventbasierte „Mitschreiben der Montage“ werden administrative und planungsintensive Prozesse in der Arbeitsvorbereitung überproportional reduziert und die Erstellung der Stückliste in die manuelle Montage transferiert.
Smartification and digital refinement of products to enable the design of smart ones is a pivotal challenge in the manufacturing industry. Companies fail to design smart products due to missing knowledge of digital technologies and their integral part in product development processes. This paper presents a methodology that enables the derivation of digital functions for smart products through selected cases in manufacturing usage. We develop a morphology that consists of digital functions for smartification. In this context, we explained and derived characteristics by a set of examples regarding smart products in the manufacturing industry. Our methodology reduces the time spent initiating a development project with the focus on smartification.
In diesem Beitrag werden die aktuellen Aktivitäten im Forschungsprojekt „SiZu – Integration von Echtzeitsimulation und Zustandsüberwachung zur Bauteilprognose und Fehleranalyse für die Instandhaltung“ vorgestellt. Ziel des Projektes ist es, die bislang separat genutzten Funktionalitäten Condition-Monitoring und Echtzeitsimulationen in einem Analysewerkzeug (Condition- Analyser) für die Instandhaltung zusammenzuführen und damit Zustandsüberwachungssysteme um die Möglichkeit der Nutzung historischer Anlagendaten und Echtzeitsimulation zu erweitern. Neben der detaillierten Beschreibung der angestrebten Forschungsergebnisse und den daraus resultierenden Nutzungspotentialen für die Instandhaltung wird die zur Zielerreichung entwickelte Vorgehensweise vorgestellt und diskutiert.
Remote services are services enabled by information and communication components and therefore do not require the physical presence of a service technician at the service object to provide a task. The impact of remote service on the capital goods industry has been increasingly significant over the recent yeas. Still many companies struggle with developing and implemenling successful business model, for remote service. This leads to a lot of unaccomplished benefits for the customer as well as for the companies themselves. A survey throughout companies in Ihe industrial machine and plant production sector was conducted in order to determine what successful companies do differently from those that cannot efficiently implement remote service business models.
The study presented in this chapter identifies key suceess factors of companies that effectively implemented remote services for their products. In order to identify the successful companies a scale for measuring remote service success was developed. Only by the use of this scale further findings regarding the success factors were possible. Key findings include the fact that successful companies actively market their remotle service to their customers. Generally they try to approach their remote service business from the operating company's perspective.
Dynamische Märkte verlangen nach effizienten Produktionssystemen. Um Unternehmen in die Lage zu versetzen, ihre Produktionssysteme auf diese Anforderungen einzustellen, entwickelt der Exzellenzcluster „Integrative Production Technology for High-Wage Countries“ an der RWTH Aachen im Rahmen eines Unterprojekts eine Konfigurationslogik, die eine ganzheitliche und gleichzeitig detaillierte Beschreibung des Produktionssystems erlaubt.
Dieser Artikel stellt das entwickelte Modell zur Gestaltung der Supply-Chain detailliert dar. Als Betrachtungsgegenstand wird die distributionsseitige Lieferkette der Ersatzteillogistik gewählt, da deren Gestaltung und Betrieb eine der größten Herausforderungen der logistischen Planung bilden. Die Ersatzteillogistik wird dazu in drei wesentliche Gestaltungsfelder aufgeteilt: Netzwerkdesign, Kooperationskonzepte und Bestandsmanagement. Im Fokus der Betrachtungen stehen die Interdependenzen zwischen den Gestaltungsfeldern und ihren Elementen, da sie die Entscheidungsfindung häufig erschweren.
Die volle Bandbreite aller Abhängigkeiten ist in der Regel nicht zu erfassen. Daher erfolgt eine Reduzierung der Komplexität durch eine Fokussierung der für verschiedene Ersatzteilkategorien wesentlichen Gestaltungselemente. Hierzu wird zunächst eine Klassifizierung der Ersatzteile im Hinblick auf ihre Schlüsselcharakteristiken durchgeführt. Für jede Kategorie muss im Anschluss nur eine reduzierte Menge von Gestaltungselementen berücksichtigt werden, sodass eine vertiefte Analyse dieser relevanten Elemente möglich wird. Mithilfe eines systemdynamischen Ansatzes wird schließlich eine verbesserte Konfiguration des Netzwerkdesigns, des Kooperationskonzepts und des Bestandsmanagements der Ersatzteillieferkette auf der Basis spezifischer logistischer Anforderungen für die entsprechenden Ersatzteilkategorien erreicht.
Within each of the three design fields numerous design elements exist (e.g. degree of centralization, number of warehouses etc. in the field network design). Hence, the interdependencies of all design elements have to be analyzed to allow optimal decisions for the design of an efficient and effective spare parts logistics. Nevertheless, the complexity among all interdependencies can hardly be understood. Therefore it is necessary to reduce the complexity of design decisions by focusing on the most important design elements according to the logistical requirements of different spare part categories. In order to achieve this goal, a classification of spare parts in terms of their key characteristics has been developed. For different spare part categories only a smaller set of design elements and their interdependencies has to be taken into account. The reduced number of key design elements per spare part category can be analyzed and understood in depth. Thus a Systems Dynamics approach is used to allow a better configuration of network design, cooperation concepts and inventory management in spare parts Supply Chains on the basis of specific logistics requirements of different spare part categories.
In dynamic markets flexible and efficient production systems are the main success factor for companies. The production system in this context includes all five phases of the SCOR-Model: Source, Make, Deliver, Plan and Return. In a subproject of the cluster of excellence "Integrative Production Technology for High-Wage Countries" at RWTH Aachen University, a configuration logic is being developed that enables companies to configure their production system according to the dynamic requirements of the market. As a major intermediate result, a holistic description model for production systems has been defined. In combination with numerous attributes in the sub-models, a detailed characterization of the production system is possible.
The sub-model for the design of the Supply Chain (mainly Deliver) will be depicted in detail in this paper. Representative for the design of a Supply Chain, spare parts logistics - as one of the most challenging tasks in logistics planning - is analyzed in depth. For this purpose spare parts logistics is divided into three design fields: network design, cooperation concepts (e.g. with logistics providers, customers, suppliers) and inventory management. Decisions in the design fields are highly interdependent, any spare parts logistics configuration has to take these interdependencies into account.
Digital networking via the company and as well, the overall supply chain, can only succeed if digital planning reflects reality as accurately as possible and if production control can react to deviations in real time. In essence, this leads to a development of process control towards process regulation. While longterm production and resource planning is usually mapped by Enterprise Resource Planning (ERP) systems, detailed planning, including short-term deviations and real-time data at the production level, is increasingly supported by Manufacturing Execution Systems (MES) at the production control level. However, in order to bring the underlying system concepts into line with Industry 4.0 efforts in a standardized manner, mutual functional integration within the framework of interoperable production planning and control is of crucial importance. For this purpose, studies were carried out in particular into cause-effect relationships. Thus, the overarching research objective is a valid design model to increase the controllability of production planning and control systems (PPC) in the context of Industry 4.0.