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Influenced by the high dynamic of the markets the optimization of supply chains gains more importance. However, analyzing different procurement strategies and the influence of various production parameters is difficult to achieve in industrial practice. Therefore, simulations of supply chains are used in order to improve the production process. The objective of this research is to evaluate different procurement strategies in a four-stage supply chain. Besides, this research aims to identify main influencing factors on the supply chain’s performance. The performance of the supply chain is measured by means of back orders (backlog). A scenario analysis of different customer demands and a Design of Experiments analysis enhance the significance of the simulation results.
Influenced by the high dynamic of the markets and the steadily increasing demand for short delivery times the importance of supply chain optimization is growing. In particular, the order process plays a central role in achieving short delivery times and constantly needs to evaluate the trade-off between high inventory and the risk of stock-outs. However, analyzing different order strategies and the influence of various production parameters is difficult to achieve in industrial practice. Therefore, simulations of supply chains are used in order to improve processes in the whole value chain. The objective of this research is to evaluate two different order strategies (t, q, t, S) in a four-stage supply chain. In order to measure the performance of the supply chain the quantity of the backlog will be considered. A Design of Experiments approach is supposed to enhance the significance of the simulation results.
With big data-technologies on the rise, new fields of application appear in terms of analyzing data to find new relationships for improving process under-standing and stability. Manufacturing companies oftentimes cope with a high number of deviations but struggle to solve them with less effort. The research project BigPro aims to develop a methodology for implementing counter measures to disturbances and deviations derived from big data. This paper proposes a methodology for practitioners to assess predefined counter measures. It consists of a morphology with several criterions that can have a certain characteristic. Those are then combined with a weighting factor to assess the feasibility of the counter measure for prioritization.
This research area focuses on the management systems and principles of a production system. It aims at controlling the complex interplay of heterogeneous processes in a highly dynamic environment, with special focus on individualized products in high-wage countries. The project addresses the comprehensive application of self-optimizing principles on all levels of the value chain. This implies the integration of self-optimizing control loops on cell level, with those addressing the production planning and control as well as supply chain and quality management aspects. A specific focus is on the consideration of human decisions during the production process. To establish socio-technical control loops, it is necessary to understand how human decisions are made in diffuse working processes as well as how cognitive and affective abilities form the human factor within production processes.
Industry 4.0 and the consequent necessity of digitalization has also impli-cations to the field of procurement, resulting in the so-called term of Procurement 4.0. Digitalization can be a valuable tool to increase the efficiency of the procurement organization and to exploit new opportunities of growth. A mandatory requirement to perform the digital transformation is an increased transparency along the procurement process chain. This paper aims to conceptualize a digital shadow for the procurement process in manufacturing industry as a basis for advanced data analytics procedures. The term digital shadow stands for a sufficiently accurate, digital image of a compa-ny's processes, information and data. This image is needed to create a real-time eval-uable basis of all relevant data in order to finally derive recommendations for action. The formation of the Digital Shadow is thus a central field of action for Industrie 4.0 and forms the basis for all further activities.
One major problem of today’s producing companies is to reach a high adherence to delivery dates while considering the volatile market situation as well as economic aspects. This problem can only be solved by using a production control that is optimally adapted to the processes. A good working, process-oriented production control is essential for being able to control the production situation and to ensure a high adherence to delivery dates. Data generation and processing determine the success of production control. Current processes and IT systems have several shortcomings in meeting these challenges.
The solution for this problem is the so called “cyber physical production control” (CPPC). It optimally supports the production scheduler in his decision making process based on real-time high-resolution data. With the help of data analytics, the production controller receives decision support over various steps. Due to CPPC, the overall goal of a high adherence to delivery dates can be fundamentally increased.
Der FIR e. V. an der RWTH Aachen arbeitet mit anderen Instituten im Aachener Exzellenzcluster "Integrative Produktionstechnik für Hochlohnländer" daran, die Wettbewerbsfähigkeit von deutschen Unternehmen zu stärken. Ein Ziel ist es, die Qualität und die Effizienz der menschlichen Entscheidungen innerhalb der Disposition zu verbessern. Zur Steuerung und Optimierung von Lieferketten greifen Entscheider auf eine Vielzahl von Informationen aus der Logistik zurück, die sie schnell erfassen, verarbeiten und richtig interpretieren müssen. Menschen handeln aber nicht ausschließlich rational und die Qualität der Entscheidungen hängt von zahlreichen und
individuell unterschiedlichen Größen ab. Zur Unterstützung der Mitarbeiter und einer Verbesserung der Planung einer Supply-Chain wird im Rahmen des Teilprojekts die folgende Kernfrage untersucht: Welche Wechselwirkungen existieren innerhalb von Lieferketten zwischen Beschaffungsstrategie und übergeordneten Zielgrößen unter Berücksichtigung verschiedener Nachfrageszenarien?
Im Kontext Industrie 4.0 kommt der Erfassung der anfallenden Daten in der Produktion und deren Nutzung eine zentrale Bedeutung zu. Analysen betrieblicher Daten, welche auf verschiedenen Ebenen generiert werden, lassen Rückschlüsse und Erkenntnisse zur besseren Entscheidungsfindung zu. Die Basis für den Einsatz von Verfahren der Datenanalyse und -auswertung stellt ein hinreichend genaues Abbild der relevanten Daten - der Digitale Schatten - in der Auftragsabwicklung, Produktion, Entwicklung oder angrenzenden Bereichen dar.
Im Rahmen des vorliegenden Beitrages wird ein Modell für den Digitalen Schatten in der Auftragsabwicklung vorgestellt, welches die Basis für die Implementierung von Methoden der Datenanalytik darstellt.
In der vorliegenden Dissertationsschrift wird ein Referenzmodell für den Digitalen Schatten in der Auftragsabwicklung in der Einzel- und Kleinserienfertigung entwickelt. Hierzu wird ein Datenmodell für den Digitalen Schatten hergeleitet, welches eine durchgängige echtzeitfähige Abbildung von Fertigungsaufträgen in der Auftragsabwicklung sicherstellt. Insbesondere die ortungsbasierte Datenerfassung auf Basis der Geoposition stellt eine Innovation im Vergleich zu bisherigen Ansätzen dar. Weiterhin wird ein Prozess zur Sicherstellung der Datenqualität aufgezeigt, welcher eine Identifikation sowie Korrektur von fehlenden und fehlerhaften Daten auf Basis von Integritätsregeln sowie multimodaler Sensorfusion ermöglicht. Zuletzt werden Gestaltungsempfehlungen zur Umsetzung des Referenzmodells für den Digitalen Schatten in der Auftragsabwicklung durch Verortung der entwickelten Komponenten in einer Gesamtarchitektur, einer IT-technischen Umsetzung sowie eines Vorgehensmodells zur Umsetzung in der betrieblichen Praxis gegeben.
Today, manufacturing companies are facing the influences of a dynamic environment and the continuously increasing planning complexity. Using advanced data analytics methods, processes can be improved by analyzing historical data, detecting patterns and deriving measures to counteract the issues. The basis of such approaches builds a virtual representation of a product – called the digital twin or digital shadow.
Although, applied IT systems provide reliable feedback data of the processes on the shop-floor, they lack on a data structure which represents real-time data series of a product. This paper presents an approach for a data structure for the order processing which overcomes the described issue and provides a virtual representation of a product. Based on the data structure deviations between the production schedule and the real situation on the shop-floor can be identified in real time and measures to reschedule operations can be identified.