# Reconfigurable Supply Chain Selection: Literature Review, Research Roadmap and New Trends
## 1 Introduction  
The authors of [1] defined supply chain configuration as a set of supply chain units and links between them, determining the structure of the supply chain and the attributes of the supply chain network. This concept concerns the selection of suppliers, parts, processes and transportation modes at each level of the supply chain [2]. The authors of [3] indicated that this selection can be modified based on the product family for each customer. From a structural perspective, the supply chain configuration can be considered as a set of nodes and connections between nodes [4], or as a constellation of interconnected elements [5]. From an organizational perspective, supply chain configuration is related to the integration of the company's strategies and operations with the other actors in the chain [6]. In a configurable system, there is a high level of integration among its parts through common strategies and policies that are directed toward common objectives [1]. Furthermore, configuration should be viewed as an evolutionary process and not a dynamic design effort [7]. To put it simply, maintaining a successful supply chain requires adapting its configuration to changing market needs. In fact, for adapting and aligning objectives to new needs, they must be oriented towards dynamic configuration management. Indeed, configuration management is an approach used to identify the characteristics of the functional and physical components of an item in the early phases of its life cycle, to control changes made to these characteristics, and to record and report the processing of changes and the status of their implementation [8]. This configuration management is an important factor in the implementation of systems engineering, including the control and justification of configuration changes [9, 10]. The causal link between supply chain configuration and the need for change or reconfiguration is related to the dynamic nature of the supply chain caused by the market'sinstability and the rapid evolution of new technologies. The author of [10] indicated that configuration management refers to the management of change allowing for the identification and acceleration of modifications. From the same point of view, The authors of [11] considered that configuration is a state designating the complexity of change management at the process level. Research conducted on the concept of supply chain configuration shows that its structuring depends on several factors related to organizational strategies, change strategies and product. Based on this analysis of definitions, we propose the following definition for \"Supply Chain Configuration\":  
_\"Supply chain configuration is the way in which a company organizes its network structurally and functionally in order to adapt quickly and cost-effectively to changing requirements.\"_  
Although several approaches on supply chain configuration are developed, few works have addressed this problem in the context of reconfigurable supply chains. The objective of this paper is to conduct a literature review on the selection criteria of the most reconfigurable configurations in the different levels. This study leads to the proposal of a roadmap for the selection of the reconfigurable supply chain configuration. In this work, we propose concepts that can contribute to improving the selection problem in the context of reconfigurable supply chains. This article aims to answer the following research questions:  
* RQ1: What are the criteria for selecting the most reconfigurable supply chain configuration? * RQ2: What are the steps required to successfully select a supply chain configuration? * RQ3: What are the new trends to consider in the selection of a reconfigurable supply chain configuration? The selection of supply chain configuration (warehouse and plant locations, choice of transportation routing, etc.) is becoming a complex decision due to the increase in supply chain actors, which can be considered as a complex network composed of several nodes and interactions.