Waste Collection Vehicle Routing Problem: Literature Review

Waste generation is an issue which has caused wide public concern in modern societies, not only for the quantitative rise of the amount of waste generated, but also for the increasing complexity of some products and components. Waste collection is a highly relevant activity in the reverse logistics system and how to collect waste in an efficient way is an area that needs to be improved. This paper analyzes the major contribution about Waste Collection Vehicle Routing Problem (WCVRP) in literature. Based on a classification of waste collection (residential, commercial and industrial), firstly the key findings for these three types of waste collection are presented. Therefore, according to the model (Node Routing Problems and Arc Routing problems) used to represent WCVRP, different methods and techniques are analyzed in this paper to solve WCVRP. This paper attempts to serve as a roadmap of research literature produced in the field of WCVRP

A management model for closed-loop supply chains of reusable articles: defining the issues

In this paper a conceptual model for the management of closed-loop supply chains of reusable articles is put forward. This framework condenses the more relevant managerial issues arising when reuse is carried out in industrial practice. The model intends to be a guideline for practitioners dealing with this type of challenges and constitutes a first step towards the mitigation of the problematic issues involved in reuse. In further developments of this research, we propose solutions to some of the issues identified here

Analysing the Impact of Consumer Tendency in HORECA Distribution Models

With increasing complexity of today's consumer requirements, food industry decision makers should be able to respond to consumer needs much faster than ever before. The preliminary studies showed that for improving the performance and selecting suitable distribution models, decision makers in food industries should classify different types of consumers and based on the classification prepare different distributions flows. By studying the HORECA distribution channel, this paper suggest that, logistics decision makers should investigate the relationship between consumers' characteristics and urban freight distribution strategy in order to respond to the exact needs and in the follow to reduce the logistics cost

Modeling the Cost of International Trade in Global Supply Chains

In a global economy, international trade plays an important role of the economic development. This is especially relevant in emerging markets, where trade could contribute significantly to the economic growth of the country. Many studies have pointed out the relationship between logistics performance and the volume of bilateral trade. Limão and Venables (2001) analyze transport costs, Hummels (2001) analyzes transport time and Hausman et al. (2013) evaluate the impact of specific improvements in logistics performance in terms of time, cost and reliability (variability in time) on increased trade. International Trade ads complexity as goods move across borders where are subject to import and export activities that increase lead times and variability on financial and physical flows (e.g. more documents per trade transaction, more signatures per trade transaction, export clearance, and customs inspection). Also, these global supply chains often involve more actors and agencies that support the trade process such as inspection agencies and custom brokers. Surveys aimed at calculating these costs suggest that they may range from 2% to 15% of the value of traded goods. This paper provides a general framework to model the impact of international trade of a global supply chain. A cost function is proposed for the buyer, the seller and the upstream suppliers that explicitly refers to the additional elements of international trade. The model is applied to compare the impact of different Incoterms rules (see section 3.2.1) in an International Trade taking into account the total cost of the supply chain Blanco, E.E. and Ponce-Cueto, E. – MIT Center for Transportation & Logistics – March 2015 2 for the main actors, including the buyer (importer) and the seller (exporter). The paper is organized as follows. Section 2 includes a succinct literature review of relevant papers in global trade management, and more specifically a review of those papers that focus on the total cost in global supply chains. Section 3 defines the global supply chain under study and presents the key events in a global trade. A total global trade function is formulated in Section 4, one function cost for buyers and another for upstream sellers. In section 5 the supply chain costs under various trade scenarios are presented and a numerical example is developed in order to illustrate the applicability of the model. Discussion and conclusion are included in section 6

Designing Sorting Facilities in Reverse Logistics Systems

The main aim of this paper is to propose a multi-waste mix integer lineal programming model for locating sorting facilities in a three-level (local, regional, and central) reverse logistic network. The objective of the model is to decide the location of the storage and sorting facilities across the network. The model was applied in end of life battery recycling network in Spain. As capacity is constrained, the optimal solution moves towards a combination of regional and local facilities for storage and a central facility for sorting

Current Trends in Recovering Used Products in Retail Fashion Industry: An Exploratory Study

The fashion industry is currently shifting towards sustainable practices through the entire supply chain. Many fashion retailers like H&M, Zara and others consider sustainability the cornerstone of their corporate social responsibility programs. At the same time, Extended Producer Responsibility (EPR) legislation is holding manu-facturers and retailers responsible, especially in Europe, for waste generated at end-of-use and end-of-life phases for some specific products. Finding alternatives to the landfill for textile waste will extend textile life, contributing to the development of circular economy and sustainable business models in the fashion industry. This study identifies and characterizes, as a first stage research, current practices of product recovery for used textile in France and Germany using comparative case studies. Characterizing the reverse logistics models for textiles in each country will help to identify best practices for recovering used clothing in Europe

FORMALIZATION OF REVERSE LOGISTICS PROGRAMS: A THEORETICAL FRAMEWORK

Formalization would enable firms to profitably handle their reverse logistics operations, especially when returns involve a number of uncertainties such as increasing volume of returns, the unstable time, and different types/conditions of returned products. The main goal of this paper is to propose a theoretical framework that helps firms to implement a formalization program to manage their returns. The framework proposed covers all the stages in reverse logistics process, from return collection to sorting and treatment processes. This research work proposes the theoretical framework that provides instructions for firms formalization, with written rules and standard procedures, to better control their reverse logistics process. Companies can effectively structure their reverse logistics activities with own formalization system based on the theoretical framework proposed in this paper

Propuesta de un marco conceptual para el análisis comparativo de las redes de distribución de dos supermercados online = Proposal of a conceptual framework for the comparative analysis of the distribution networks of two online supermarkets

In this article the network configuration for fulfillment and distribution of online orders of two British retailers is analyzed and compared. For this purpose, it is proposed a conceptual framework that consists of the key following aspects: network configuration, transportation management and location of demand. As a result is not obvious to determine the ideal centralization degree in each case. Finally, it is suggested the future development of an analytic tool that helps to choose the most appropriate model

Reverse logistics systems for waste generated throughout vehicles life-cycle

Waste produced during the service life of automobiles has received much less attention than end-of-life vehicles themselves. In this paper, we deal with the set up of a reverse logistics system for the collection and treatment of use-phase residues. First, the type of waste arising during vehicles? service life is characterized. Data were collected in collaboration with SIGRAUTO, the product stewardship organization in charge of vehicles? recovery in Spain. Next, three organizational models are proposed. The three alternatives are benchmarked and assessed from a double organizational and operational perspective for the particular case of the Madrid region in Spai

Integrating forward and reverse logistics network for commercial goods management. An integer linear programming model proposal

[EN] In this study, an optimization model is formulated for designing an integrated forward and reverse logistics network in the consumer goods industry. The resultant model is a mixed-integer linear programming model (MILP). Its purpose is to minimize the total costs of the closed-loop supply chain network. It is important to note that the design of the logistics network may involve a trade-off between the total costs and the optimality in commercial goods management. The model comprises a discrete set as potential locations of unlimited capacity warehouses and fixed locations of customers’ zones. It provides decisions related to the facility location and customers’ requirements satisfaction, all of this related with the inventory and shipment decisions of the supply chain. Finally, an application of this model is illustrated by a real-life case in the food and drinks industry. We can conclude that this model can significantly help companies to make decisions about problems associated with logistics network design.Ponce-Cueto, E.; Molenat Muelas, M. (2015). Integrating forward and reverse logistics network for commercial goods management. An integer linear programming model proposal. International Journal of Production Management and Engineering. 3(1):25-32. doi:http://dx.doi.org/10.4995/ijpme.2015.3314.SWORD253231ACOTRAM. (2014). Asistente para el Cálculo de Costes del Transporte de Mercancías por Carretera. Published by the Infrastructure Ministry of Spain