1. Introduction
Logistics has been identified as one of the core pillars of economic development [
1]. It involves the process of planning, implementing, and controlling effective and efficient forward and reverse flow of goods, information, finances, and services from production to consumption, and vice versa, in a way that satisfies customers and complies with environmental requirements [
2] (
Figure 1). Some of the basic logistics processes include transportation, warehousing, procurement, and inventory management [
3]. Logistics is crucial for any economy [
4], as it affects the productivity of organizations [
5]. Organizations benefit from a properly managed logistics system, since it results in improved mobility of their goods [
6]. An effective logistics management system aids firms in gaining competitive advantage through value enhancement and cost reduction [
7]. In recent years, digitalization and automation have been introduced in logistics chains to create a logistics system that is interconnected, intelligent, integrated, and automated [
8]. These technologies are vital to logistics, as they enable proper and sound management of complex logistics environments [
9]. They also contribute to sustainability by reducing logistics costs and lowering environmental impacts [
10]. Additionally, digitalization and automation in logistics decrease the rate of error occurrence and improve the level of quality [
11]. These technologies are also applied for reverse logistics. In recent years, the flow of products being returned to manufacturers has increased immensely. This increase has led to the application of digital technologies in reverse logistics, to track products and parts that are being returned [
12].
The internet of things (IoT) and other enabling technologies, such as radio frequency identification (RFID) and smart sensors, enable real-time monitoring of the whole supply chain [
13]. These technologies are used in vehicle fleet management and for monitoring the condition of goods being transported [
14]. Technologies such as blockchain enable information sharing among stakeholders and help in mitigating common challenges in logistics, such as loss of documentation and unknown source of products [
15]. Blockchain, as an alternative to a trusted third-party database, also creates mutual trust among stakeholders by recording transactions that are impossible to tamper with. Cloud computing (CC) is used for computation in a pay-as-you-go method, reducing within-premises expenses such as software, hardware, and maintenance [
16]. Big data analytics (BDA) adds value in logistics by analyzing the data generated by IoT devices [
17] and making meaningful interpretations and predictions. Special types of robots known as autonomous guided vehicles (AGVs) are implemented in warehouse and inventory management for material handling [
18], reducing the need for operating personnel [
19].
Previous studies have shed light on many new digital technologies, their characteristics, and their applicability. Some also provide analyses of adoption of emerging technologies for logistics and supply chain management. Horvath and Szabo [
20] conducted a qualitative study to determine the barriers encountered by both small- and large-scale companies when adopting digital technologies. Using analytical hierarchy process (AHP), Luthra and Mangla [
21] identified and ranked the key challenges in implementing digital technologies. Singh and Bhanot [
22] used the decision-making trial and evaluation laboratory (DEMATEL) technique to analyze the barriers to implementing IoT. Sriram and Vinodh [
23] examined the factors that small and medium-sized enterprises (SMEs) need to consider when adopting digital technologies and prioritized them using a multicriteria decision-making (MCDM) framework. According to Bellman and Paul [
24], recommended practices are identified to determine actions that need to be taken to reach a desired outcome. The identification of digitalized logistics practices is vital to improve the performance of the logistics chain. It aids stakeholders in deciding which technologies to implement in their logistics chain and can facilitate the transferability of knowledge and experience from one region to another. However, research on digitalized practices in logistics for application in low-income countries is still lacking.
Low-income countries are associated with poor logistics performance, as their supply chains are unreliable [
1]. Their logistics systems are characterized by long lead times [
25], lack of adequate infrastructure, and higher logistics costs [
26]. Therefore, there is a need to develop solutions that can improve these systems. Although there has been an exponential rise in the accessibility of enabling technologies in recent years, uptake of these technologies in low-income countries is still in its infancy. Thus, the objective of the present study was to assess digitalized logistics on a global level and identify digitalized logistics practices suitable for implementation in low-income countries to improve the performance of their logistics systems. Specifically, the study addressed the following important research questions:
What are the state-of-the-art technologies in logistics in relation to the application of digitalization and automation?
What are the criteria for the application of digitalization and automation practices in logistics?
Which digitalized logistics practices could best be implemented in low-income countries?
4. Discussion
A systematic literature review was conducted on publications examining the application of digitalization and automation technologies in logistics, in order to identify state-of-the-art technologies. Analysis showed that 59% of the papers were from high-income countries, 29% were from upper-middle-income countries, 12% were from lower-middle-income countries, and there were no publications from low-income countries (
Table 3). A study by Moldabekova et al. [
101] revealed that low-income countries had the lowest progress in terms of technological innovation. Thus, the under-representation of studies from low-income countries in the present study could be attributed to infancy in the application of digital technologies. A common theme of publications from lower-middle-income countries was the study of the possibility of adopting digital technologies in their logistics chains by surveying companies that have already adopted the technologies. In contrast, common themes of publications from high-income countries were the optimization of the existing digitalized system, the simulation of the performance of digitalized systems under various conditions, and the search for sustainable digital solutions. As some of the challenges faced by lower-middle-income countries and low-income countries are similar, the lessons learned from the former could expedite the adoption process for the latter.
The weights given by the experts for accessibility, policy, HR, social benefit, and environmental benefits were lower compared to economic benefit, infrastructure, and affordability (
Table 6). This, however, does not mean that firms in low-income countries should disregard the criteria with lower weights. When firms in low-income countries adopt digital technologies, if their focus is just on economic benefit, infrastructure, and affordability, they risk providing short-term solutions. This will create problems during the adoption process, as there would not be skilled labor to run the technologies and the existing government policies might not facilitate the adoption processes. Rather, firms in low-income countries should also make long-term plans to develop sustainable digital solutions. Policy-related measures should be developed by government officials to aid the adoption process. As human resources are important for running and operating these technologies, it is important that necessary capacity-building training be provided by creating linkages among firms, academics, and professionals.
The evaluation of published case studies using the criteria revealed that studies in middle- and high-income countries prioritized economic, social, and environmental benefits (
Figure 10). Together, the studies of middle- and high-income countries primarily focus on the broad contribution of digital technologies to sustainability. This is in line with the World Economic Forum [
102], which emphasizes the economic, social, and environmental gains from adopting digital technologies.
Technologies such as IoT, RFID, blockchain, BDA, and sensors have been widely applied in middle- and high-income countries for production operations, traceability, port operation, and fleet management (
Table 8). These technologies can potentially reduce the incidence of defects and increase production flexibility [
95]. Since technological innovation and readiness are important promoters of logistics efficiency [
101], their implementation in low-income countries can reduce lead time [
72] and lower coordination and management costs [
103]. Supply chains in low-income countries function poorly due to a lack of traceability [
104]. Thus, technologies such as IoT can be implemented in their supply chains to improve the connectivity of goods, facilitate visibility, and achieve a high level of efficiency and effectiveness [
8,
64]. By implementing IoT-enabling technologies, such as RFID and sensors, organizations can obtain the stock status of their company, maximize efficiency at minimal cost, save time, provide better control, and improve accuracy for inventory management [
105]. The adoption of these technologies can also inhibit the spread of counterfeit products, which is a problem in a number of sectors, including the healthcare supply chain, in low-income countries [
104]. Organizations in low-income countries can also use BDA and GPS technologies for fleet management to reduce car accidents and emissions caused by trucks [
70].
Although digital technologies have applicability in numerous sectors, the SLR revealed that one of the most strongly influenced sectors was the agri-food supply chain (
Figure 8). This may be because other sectors such as the automotive and electronics sectors are already integrated compared to the agri-food sector. Thus, new enabling technologies in the agri-food sector can potentially improve how the sector operates and integrate stakeholders, which was not possible before. Since perishable foods have the highest food loss rate [
106], logistics processes should be optimized to ensure food security [
107]. In low-income countries, postharvest food losses mainly occur due to inappropriate storage environments and transportation problems [
108]. This creates an imbalance between demand and supply, as most of the food produced spoils before it reaches consumers. To mitigate food losses in low-income countries, digital technologies can be implemented in the logistics chain [
87]. Continuous tracking of the storage and transportation environment is crucial to preserve the freshness of food [
107]. Hence, an IoT platform can be used to enable end-to-end traceability [
89]. The use of IoT-enabling technologies, such as RFID, can improve the revenue of the supply chain by reducing logistics costs and product losses [
109]. Sensors that gather data on temperature, humidity, and location can be used to monitor the condition of goods, while BDA can be used to analyze the information sent from the sensors [
87]. Blockchain can be used in the agri-food sector to ensure traceability and reduce the occurrence of foodborne outbreaks. Blockchain can also be used by consumers to track the origin of the food that they have purchased [
67]. Since one of the barriers to the adoption of technologies is network availability [
92], governmental intervention by building necessary infrastructures may be required to facilitate the process of adoption in low-income countries. The government can also improve network reachability, since internet connection is fundamental for operation [
85]. This will hinder stakeholders along the supply chain from reverting to traditional methods to carry out their logistics activities.
In order to advance the level of digitalization, strategies that aid the process of implementation need to be identified [
85]. Ghobakhloo and Fathi [
84] concluded that smaller businesses could start by digitizing certain core operations in their chains. Accordingly, organizations from low-income countries can identify areas of their supply chains that need prioritization for digital transformation in circumstances where affordability is an issue. Alternatively, low-income countries can use low-cost digital solutions. For instance, smartphones are readily available and can be used for real-time monitoring and traceability in the supply chain [
87]. Barcodes and QR codes can also be used for traceability, due to their low cost [
110]. However, barcodes and QR codes can only read objects that are within the line of sight of the reader [
110,
111]. Therefore, RFID has become the leading technology for automatic identification [
112]. Organizations in low-income countries also need access to the required cloud services and infrastructures for the technologies to operate well. To experience the full capability of digital solutions, other stakeholders along the supply chain should also be willing to adopt these technologies. Robust and sustainable technology solutions could enable the improvement of their logistics system and increase their competitiveness in the global market.
In summary, the recommended practices identified in this paper provide numerous opportunities for organizations in low-income countries to meet the logistics objectives of improving performance and reducing cost. The application of these technologies in low-income countries could increase their competitiveness in national and global markets, leading to economic development. To ease the process of implementation, digitalization should be seen as an ongoing process instead of a discrete one. Technologies that are currently accessible can be introduced in certain parts of the supply chain and then be gradually developed over time. However, implementing digitalization has negative social implications, such as cybersecurity risks and unemployment of low-skilled workers [
113]. Lack of skilled resources and resistance from workers [
114] are some of the challenges low-income countries are expected to face during implementation. Hence, workforce training may help in alleviating issues related to job security [
84].
5. Conclusions
Digitalization technologies improve the performance of logistics chains by reducing logistics costs, lowering lead times, and contributing to sustainability. The SLR conducted in this study showed that there was no literature on this topic from low-income countries and most papers were from high-income countries. Technologies such as IoT, RFID, blockchain, and BDA have received the most attention in recent years. Although the application of these technologies has been reported across numerous sectors, the SLR showed that the agri-food sector has seen the most research on the application of digital technologies.
The expert survey indicated that low-income countries weigh economic benefit, infrastructure, and affordability as the most important factors for the adoption of digital technologies. Recommended digitalized logistics practices included implementation of technologies such as IoT, RFID, CC, BDA, and blockchain, mainly for production operations, traceability, port operations, and fleet management. Thus, the practices identified in this study could be adopted in low-income countries taking into consideration local conditions, particularly relating to existing infrastructure.
The limitations of this study are that the SLR only included peer-reviewed papers. The case studies that were used to identify digitalized logistics practices were also peer-reviewed papers obtained from the SLR. Hence, further research where nonacademic papers are reviewed is recommended. Additionally, detailed case studies are required to map the existing conditions in low-income countries, primarily concerning the readiness of organizations to implement digitalization and automation in their logistics chains.