Purpose: Efficient Operations and Supply Chain Management is key to building sustainable competitive edge for companies. However, the achievement of this goal is becoming challenging in the present dynamic production environment, as traditional Manufacturing Planning and Control systems were not developed to work in this context. The Demand-Driven Material Requirement Planning (DDMRP) methodology was developed with the aim of addressing this need and deal efficiently with material management. The present work, therefore analyzes the evolution of a company after converting from MRP to DDMRP.Design/methodology/approach: To achieve an in depth understanding of the case study a qualitative approach was taken. Data was collected from semi-structured interviews, documents and archival records enabling triangulation. The results from before and after the implementation of DDMRP were compared, and the evolution of the performance of the company was evaluated.Findings: The results clearly show that using DDMRP the company increased visibility in the supply chain. In addition, the inventory level was reduced by 52.53% while material consumption was increased by 8.7%. These results were achieved while maintaining the high service level.Originality/value: DDMRP is a relatively new methodology and for this reason there is little published data in this field. In addition the few studies found in the literature analyze the performance of DDMRP in simulated environments. The present work aims to go one step further and analyzes the implementation of DDMRP in a real company.
This research work presents an experience of the Faculty of Engineering of Mondragon Unibertsitatea using Project Based Learning (PBL) with the students of 4th semester of Bachelor's Degree in Industrial Organization Engineering (IOE). The PBL delved into the concepts developed in the subjects of Management Systems and Production Logistics. The project was contextualized in a company that produced parts for the automotive sector. Teams of students implemented a management system that enabled the efficient management of materials and the production process using tools such as Demand Driven MRP (DDRMP). As a result, they had to solve the proposed problem, develop a simulation and choose the proposal that best met the needs of the company.In order to assess PBL performance a survey was carried out. The results confirmed that the experience was positive since the achieved knowledge provided a meaningful learning experience for the students, while facilitating the development of both technical and transversal competences.
<p class="TtuloAbstract">Since the creation of the demand-driven material requirement planning (DDMRP) model, numerous studies have analysed the methodology’s significant impact on different organisations. Several successful cases and research studies into DDMRP have demonstrated that the methodology is beneficial to organisations because it increases their service level and stock adjustments; however, there is a dearth of literature regarding the steps necessary to implement this model successfully. This document delivers a systematic review of the literature based on the work done by Kitchenham (2004) with the aim of analysing studies that investigate the standardization of the process of implementing the model. Once the lack of research has been demonstrated, a possible line of future research can be outlined to standardise the implementation process of the DDMRP model to achieve its full potential.</p>
La metodología Demand-Driven Material Requirement Planning (DDMRP) fue desarrollado con el objetivo de aumentar el flujo de materiales e información de una cadena de suministro y así mejorar la ventaja competitiva de esta. En la revisión de la literatura se han identificado trabajos de investigación que analizan el funcionamiento de esta metodología en entornos simulados. Sin embargo, no se han encontrado estudios que analicen la implementación del DDMRP en una empresa real. El presente trabajo, por lo tanto, analiza la evolución que una empresa que fabrica componentes para electrodomésticos obtuvo al migrar del MRP al DDMRP. Los resultados obtenidos, demuestran que gestionando los materiales con la metodología DDMRP la empresa aumentó la visibilidad en la cadena de suministro reduciendo considerablemente el efecto bullwhip y los pedidos urgentes. Cabe destacar también la evolución del inventario, ya que el stock físico se redujo mientras que el consumo de los materiales aumentó. Durante todo el proceso el nivel de servicio de la empresa se mantuvo prácticamente en un 100%.
The current economic and manufacturing environment is characterized by increasing uncertainty and complexity. In this scenario, digitization, simulation and advanced automation are key technologies for the manufacturing of the future. A concept that has come out strongly is the Digital Twin. The digital production twin will allow manufacturers of production systems to offer services aimed at improving production throughout the entire life cycle of the facility. This article proposes a discrete event simulation procedure for the construction of the productive digital twin, in complex and highly automated production systems. As a demonstration of the developed procedure, a case study is shown on a line for the manufacture of railway axles, where simulation has been combined with multi-objective optimization. Keywords: digital twin, discrete event simulation, production systems, multi-objective optimization.
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