Methodological approach to study the dynamics of production networks: Discrete-event simulation modelling

This paper shows how discrete-event simulation represents an appropriate tool for approaching the dynamics of production networks. Three important factors influencing production network dynamics, specifically finite production capacity, manufacturing lead time, and its variability are discussed and a basic discrete-event simulation model is presented. Such model, which in its basic form represents a simple retail/distribution two-stage supply chain, is then extended in order to take into account those factors that can not be included in a classical control theoretical model

Information Exchange Supply Chain under inventory inaccuracy: a simulation study

The objective of this paper is to contribute at quantifying the impact of inventory record inaccuracy on operational performance and customer service level in collaborative supply chains. To this purpose we analyse the impact of shrinkage errors in the inventory item recording activity in an “information exchange supply chain”, i.e. a supply chain in which companies share information about market demand and use such information for placing orders to their suppliers. We present the mathematical formulation of such a supply chain model and we conduct a numerical simulation and a sensitivity analysis over different level of errors

Diseño de una red de cadena de suministro sostenible

12 páginasThis paper deals with the design of a sustainable supply chain in a high variety production environment. To respond to this challenge, a Mixed-Integer Linear Programming model is proposed. The economic criteria are the costs of transportation, and that of opening and operating manufacturing facilities; the environmental criterion is the level of CO2CO2 emissions due to transportation and storage; and the social criterion is the number of created jobs and supplier assessment. A numerical experiment is derived from industrial data of the textile sector. The results show the existing trade-offs between sustainability goals in the supply chain design context. Moreover, the differences between network structures when the decision is guided by just one of the dimensions of sustainability are compared. Finally, future research opportunities are identified to include the dynamic evaluation in the sustainable supply chain network design context.Este artículo trata sobre el diseño de una cadena de suministro sostenible en un entorno de producción de alta variedad. Para responder a este desafío, se propone un modelo de Programación Lineal Entera Mixta. Los criterios económicos son los costos de transporte y los de abrir y operar instalaciones de fabricación; el criterio ambiental es el nivel de emisiones de CO2 debido al transporte y almacenamiento; y el criterio social es el número de puestos de trabajo creados y valoración de proveedores. Se deriva un experimento numérico a partir de datos industriales del sector textil. Los resultados muestran las compensaciones existentes entre los objetivos de sostenibilidad en el contexto del diseño de la cadena de suministro. Además, se comparan las diferencias entre estructuras de red cuando la decisión se guía por una sola de las dimensiones de la sostenibilidad. Finalmente, se identifican futuras oportunidades de investigación para incluir la evaluación dinámica en el contexto del diseño de redes de cadenas de suministro sostenibles