Sustainability aspects in Inventory Routing Problem: A review of new trends in the literature

This paper presents a comprehensive content analysis-based literature review of studies on Inventory Routing Problem incorporating sustainability-related aspects. A total of 40 journal articles are selected from Web of Science and Google Scholar databases, and are reviewed by categorizing them into single-objective and multiple-objective models. The review suggests that studies with single-objective models covered areas including waste management (in reverse logistics models), returnable transport item management (in closed-loop supply chain models), waste prevention and reduction (in models with perishable products), and emission reduction (in models with emission caps and carbon price). Studies on reverse logistics are limited to collecting and storing waste at a collection site, while including waste processing and disposal operations could make them more applicable. Studies on closed-loop supply chains are few with a focus on managing returnable transportation items. Future studies could consider remanufacturing, recycling and disposal of products for efficient waste management. Most of the papers in logistics of perishable products considered waste prevention rather than waste reduction. Previous studies related to emission reduction using carbon policies mainly focused on emissions from transportation. Including emissions from other logistics operations could be useful from a practical perspective. Relatively few studies developed multi-objective models. Environmental objectives in multi-objective models focused on minimizing total emissions. Few studies considered social objectives related to minimizing inventory of hazardous material and infectious medical waste, and improving customer satisfaction. Other social aspects such as those related to traffic congestion and job creation could be considered in future studies. Furthermore, application of efficient models and solution approaches to real case studies could be valuable.