1. Introduction
It is expected that the world’s population count will reach the figure of nine to ten billion by the year 2050 [
1]. Issues related to biodiversity, climatic changes, environmental changes, and financial disruptions are erupting gradually across the globe [
2]. In this era, where the pace of development is attracting attention, a sustainable future is still a distant dream because of traditional business practices [
3].
Food supply chains (FSCs) tend to link millions of stakeholders, such as farmers, processing units, governments, and non-government organizations, handling a variety of issues related to the political arena and economic causes at national and global levels [
4]. A sustainable food supply chain (SFSC) refers to managing material, information, and capital flows underpinning the three dimensions of sustainable development, i.e., economic, environmental, and social [
5]. Nowadays, sustainability is gaining importance in food industries because of the increasing burden of the rising population, surging pollution levels, and growing awareness among consumers [
6]. Furthermore, it is projected that the global population will increase to up to nine billion by the year 2050, and agricultural production will need to be enhanced by 70 percent. This will account for 13.5 percent of the total greenhouse gas emissions, adding woes to the environmental concerns.
Furthermore, the increasing share of food wastage, due to the staggered dynamics of FSC performance systems, demands the adoption of sustainable practices within the scope of its dynamics [
7]. Approximately one-third of the global food supply is wasted or is lost in operational tiers of FSCs [
8]. In China, it is estimated that 190 kilocalories of food/person is wasted every day, and in India, 40% of food grains are wasted yearly because of inefficiencies in FSC management [
9]. Hence, the adoption of sustainable practices within FSCs is the answer to food wastage and food loss. In addition, sustainable future concerns are correlated directly with food consumption and its production, as these underpin the Sustainable Development Goal (SDG12) of the United Nations [
10].
The term sustainability encloses liabilities related to the environment, social perspectives, and financial concerns envisioned for future generations’ needs [
11]. Developments provoking sustainability need to imply changes in the production systems of various society-centered organizations, rendering the optimum utilization of natural resources [
12]. Sustainability bundles an optimized outcome to materialize social values, economic aims, and ecological concerns. Social values indicate consumers’ health and food safety for all, whereas economic values point towards a return on investment, which should be high, and ecological concerns emphasize reduced carbon footprints [
13].
The presented work aimed to establish a robust framework clustering the various practices allied with the dynamics of FSCs, embedding and strengthening the pace of the adoption of sustainability. To achieve this, a hierarchical relational model was developed, in which the possible course of the sustainable action, at every working tier of a FSC, was explored and analyzed by the multi-criteria decision-making tool TODIM. TODIM is a Portuguese acronym for interactive multi-criteria decision making, elaborated as ‘tOmada de decisao interativa multicriterio’. The aforementioned methodology was extended under the aegis of Pythagorean fuzzy set theory to incorporate the judgemental values of the field experts related to the notions under consideration. Furthermore, the outcomes of the presented work are aimed at answering the following research questions (RQ):
RQ1: What are the key embedders of sustainability within the dynamics of a processed FSC performance system?
RQ2: How can one secure the interrelationship between the developed framework of sustainability and the multi-tier functioning of FSCs?
RQ3: How can one align the various walks of a processed FSC performance system with different operation feasibilities?
2. Literature Review
Nowadays, business organizations are working to adopt sustainability in their operations and tactics [
14]. The rising demand from consumers for customization and quality is prompting FSC operations to shore up towards the path of sustainability. FSC activities are focused on food quality, food safety, and consumer health to overcome the threat of food scares. With increasing competitive spirits among various food industries, the burden of catering demand, simultaneous with quality consistency, quantity, and pricing strategies, is becoming difficult for companies. Hence, companies need to switch to sustainable processes for better market coordination and management in a holistic way [
15]. In consensus, the work of Li et al. [
16] reviewed sustainable food supply chains (SFSCs) underpinning recent value-addition developments. Murphy and Adair [
17] explored the scope of sustainability in FSCs and highlighted the tactics undertaken by food industries to collaborate with sustainable needs. Garnett [
18] found various problems and challenges, and ways to overcome them, for sustainability in FSC operations. Haass et al. [
19] developed an algorithm incorporating an innovative distribution-based network with a tendency to reduce food wastage and lower carbon emissions by selecting technically smart containers for the movement of food. Raak et al. [
20] considered 13 German-based food processing companies to assess food wastage and its accountability in quantifying sustainability. Sgarbossa and Russo [
21] developed a sustainability-based model highlighting the generation of food waste and its reuse within FSCs. Heard et al. [
22] explored the adoption of sustainability within FSCs by opting for autonomous, connected vehicles to distribute the commodities.
León-Bravo et al. [
23] analyzed the sustainability in FSCs by opting for a two-fold approach based upon securing collaborations between partners and performance analysis of its working tiers, respectively. Becker and Ellis [
24] explored the sustainability of agriculture-based FSCs based on ecological, social, and economic impacts. Furthermore, in many studies, the dimension of the economy had the highest impact on the implementation of various initiatives of sustainability, caused by opting for green supply chain practices [
16,
25,
26]. Higgins et al. [
27] applied mathematical-based optimization procedurals, considering the holistic perspective allied with the FSC to assess various sustainability-governing parameters. Zhu et al. [
28] reviewed different operation research techniques to widen the scope of sustainability in a food supply chain performance system (FSCPS). Soysal et al. [
29] focused on sustainability-based logistics in FSCs, pointing toward quantitative modeling. Garnett [
30] detailed various ways to adopt sustainable practices with the aim of improvements in efficiency, demand fulfillment capacity, and good governing bodies. Green [
31] claims that the adoption of sustainable practices within the food industry poses a big challenge for future aspects and shifts towards a risk-driven approach.
Nowadays, because of the high interlinkage between attributes and sub-attributes, optimization/outranking-based approach applications in the area of SSCM are becoming popular [
32]. A broad spectrum of multi-criteria decision-making (MCDM) techniques includes solutions to various multi-attribute and objective problems. Linnemann et al. [
33] used an MCDM-based analytical hierarchy process (AHP) to evaluate the alternatives governing FSC design and transparency improvements. Allaoui et al. [
34] used an AHP-based two-stage objective hybrid approach meant for multi-objective optimization in designing SFSCs. Lahane and Kant [
35] outranked various barriers, hurdling the dynamics of the circular supply chain by extending a hybrid combination of fuzzy-based AHP-DEMATEL methodology. Malek and Desai [
36] developed a framework to prioritize the barriers to sustainable manufacturing. Sufiyan et al. [
37] used a fuzzy-based decision-making trial and evaluation laboratory (DEMATEL) to evaluate mutual interactions among performance-based criteria in FSCs. Gardas et al. [
38] (2018) used the MCDM technique, namely DEMATEL, to prioritize the causes behind post-harvest losses of food items in FSCs for attaining sustainability within the operation. Sharma et al. [
39] assessed the mutual interrelationship between temperature monitoring trends in FSCs by implementing the methodology of DEMATEL.
Govindan et al. [
40] developed a multi-objective-based model for a two-tier routing and locating problem for an SFSC, impacting costs and the environment. Azadnia et al. [
41] formulated an approach comprising multi-objective-based programming, enabling sustainability in selecting suppliers and optimum lot sizing, tending to minimize costing and maximize profits of SFSCs. Kannan [
42] assessed the role of various stakeholders and allied success factors for securing sustainability-based supplier selection. Tavana et al. [
43] extended the methodology in the fuzzy environment for supplier selection engaged within the reverse supply chain. Oglethorpe [
44] used a goal-programming-based technique that enabled decision makers to evaluate FSC strategies based on the dimensional goals of economy, ecology, and social needs. Bortolini et al. [
45] formulated a programming model for sustainability in food distribution, costing related to operations, and carbon footprint generation within FSCs. Mehlawat et al. [
46] assessed three tier-based sustainability perspectives in the distribution channel of the supply chain. Liu et al. [
47] focused on the minimization of supply chain costs allied with the transportation of commodities by freezing mutual consensus between the operators. Nagurney and Nagurney [
48] presented a model that aimed to optimize the network of an FSC by considering capacity constraints and costings by using a multi-criteria-based approach.
Few studies considered human dietary patterns to secure sustainable avenues of production and consumption by accounting for the cost of food, carbon emissions for the food, and nutrition [
49,
50,
51]. Verkerk et al. [
52] found that the design of FSC systems was directly associated with the perspective of human health and the nutritional value of food.
Model Development
The presented work was aimed at clustering the various enactors of sustainability in the dynamics of a processed food supply chain. To achieve this, a holistic working approach was opted for in order to alter FSCs from their upstream to their downstream operational tiers, along with allied practices from the perspective of sustainability. Insights from the research literature cluster various sustainable practices allied with every tier in processed FSCs (refer
Table 1). This led to the development of the relational hierarchical model detailed in Figure 2. For the ease of visualization during the course of mathematical contemplations, the tiers of the FSCs, which are representing the criteria here, are abbreviated as CTR1, CTR2 … and CTR6, whereas representative practices are notated as SN1, SN2, SN3 … and SN12, seeding the development of the proposed model.
The developed relational hierarchical model comprised the various functional tiers of an FSC on the top hierarchy, which governed the sustainable practices, respectively. In the second level of the hierarchy, various practices governing sustainability in the considered functional tiers of an FSC were framed in relation to criteria in the top and alternatives in the bottom hierarchy. At the bottom, practices in the middle hierarchy were found to be equally likely to be dependent and have a close association with the social, environmental, and economic factors. In
Figure 1 represents operational tiers that have a linkage with their relative set of sustainable practices. Whereas, every practice had a linkage with the bottom hierarchy constituents.
4. Result and Discussions
Outcomes of the analysis resulted in securing the primacy of the sustainability enactors under consideration, which were governed by the criteria under consideration and bound equal dependencies upon the dimensions of sustainability (social, economic, and environmental). Results grounded by the hybrid combination of the Pythagorean fuzzy set and TODIM secured the priority ordered as SN
11 > SN8 > SN5 > SN10 > SN7 > SN4 > SN3 > SN9 > SN6 > SN12 > SN2 > SN1. The overall dominance degree was utilized to establish the priority of the various sustainable practices under consideration as shown in
Table 7. Quantified values allied with the priority were plotted, aiding the ease of visualization of the results in
Figure 3.
It could be inferred from the plots that among all the embedders of sustainability in processed FSCs practice Labelling of all the key information (SN11), which outranked the others highly with a maximum value of 1.0000. Labeling defines the details associated with the processed food commodity, in terms of its ingredients, shelf life, manufacturer, and pricing. Generally, consumers presume sustainability as the insignia of environmental concerns. Labeling the key information of processed food items blurs this assumption and broadens the consumer’s thoughts, flipping awareness towards economic and social concerns. Product packaging material details, costing, and nutrient value assure of the quality as well as capture the consumer details towards the dimension of sustainability. It was estimated that in the United States of America (USA), labeling the details allied with the sustainability of processed food items, captured the market, as well as consumer choice over cheap spurious products, causing a surge of 12 percent in the year 2012 [
78]. Furthermore, labeling the information built up the product share in the market, and found compliance with consumer choices. It is key to achieve widespread awareness about sustainability among the masses, from the urban to the rural geographical regimes, promoting avenues of sustainable FSC procedures. Such practices ensure the flow of quality-conforming food products at low prices, balancing the supply and demand patterns, respectively. Rendering smart packaging solutions in the dynamics of the processed FSC, reduces food losses, and promotes economic and technical efficiency in the products’ transits, enhancing the transparency in the operations. Smart packaging of food items determines the product storage environmental conditions, and safeguards products from pilferage and external contamination, as well as enables real-time monitoring protocols from remote locations. Enacting such solutions improves the shelf life of perishable food items, curtails food wastage, and promotes the economic viability of FSC operations.
Ramping up economically viable solutions, reduces costs and improves the profitability within FSCs. Ensuring food to all sections of the society and its pricing withholds the pillars of food safety and security. Lack of economic operations results in inflated prices for the essential food commodities, distorting the social concerns allied with it. Assuring economic operations reduces the carbon footprint and emission levels associated with the support systems, promoting sustainability in the journey from farm to fork. Such scenarios seed the design and development of sustainable FSC operations, where consumers favor optimal product buying and manufacturers make a shift towards production plans underpinning the dimensions of economic, social, and environmental perspectives. For the same, various operating protocols and procedurals need to be streamlined in the dynamics of processed FSCs. All the measures of sustainability beginning from the procurement and ending at the consumer need to be standardized and operating measures must be baselined. Procurement procedures, supplier selection, operating capacities, and location of the warehouses and distribution centers should be forced by accounting for the impacts of the environmental vulnerabilities, economic feasibilities, and socially susceptible scenarios.
Expediting the pace of the research and development activities within the working envelope of the supply chain activities will aid sustainability. Development of key constituents and framing product recipes, which can tend to overcome perishability and assure a prolonged shelf life, aid in packaging solutions and the design of a supply chain network tailored to seed the venues of sustainability. Assessment of a supplier’s performance and monitoring for underpinning the sustainability notions, as well as ensuring the flow of quality products through the tiers of the processed FSC network, bridges the gap between the supply and demand pattern.
5. Conclusions and Implications
The presented work is aimed at embedding sustainability within the dynamics of a processed food supply chain performance system, which addresses the prosperous avenues of its demand. Production and consumption of processed food items are increasing and capturing the market, irrespective of the geographical regime. To secure these prosperous avenues and feed the masses effectively and efficiently, sustainability needs to be embedded within FSCs. For the same reasons, various key practices enacting sustainability within the various working tiers in FSCs were clustered from the core of the research literature and further validated and judged by field practitioners. Hence, the outcomes of the presented work implied a two-fold approach, accumulating the insights of the research literature as well as the field practitioners to ground the various practical feasibilities allied with it. The outcomes of the proposed methodology of the TODIM, governed by the linguistics of Pythagorean fuzzy sets, resulted in the establishment of the priorities of the identified embedders of sustainability, from the developed relational hierarchal framework.
The presented work had its scope of implications in the multi-disciplinary domains, extending towards the working arenas of industry, academia, and government bodies. This study conceptualized the various aspects of sustainability within processed FSC dynamics, facilitating the managers and top management of the food processing industry to deepen their thoughts about these issues, by-passing the various misconceptions and dilemmas allied with it. Furthermore, the developed framework empowered managers to critically examine the scope of sustainability at every working tier in an FSC, in light of the practices under consideration. This aided in the development of various policies, strategic roadmaps, and decisional and tactical frameworks that pave the way for sustainability in the future course of the actions of an FSC. By the secured priority of the embedders under consideration, managers should ground the procedurals, detailing the labeling of key information on the product packaging, and measures in the direction of smart packaging solutions should be deliberated in a phased manner to mark the progress towards sustainable futuristic needs. Furthermore, a unified working approach between industry, academia, and ruling governments could flip the darker side allied with this domain. Academicians can collaborate with industries to render the various robust cost-effective technological solutions and upgrades, which could shun the darkness of the traditional practices in the operations. However, ruling governments should make the masses aware of the importance of a sustainable course of action. Various concerned bodies should streamline the various procedures and should enforce the rules governing sustainability in the journey from farm to fork. Various infrastructure needs should be fulfilled, and robust planning-based outcomes should be materialized by uniting the notions of industry needs and academic expertise to secure sustainable food supply chains. Hence, in a nutshell, the proposed framework and contemplation of sustainable practices diversified the scope of the various theoretical, practical, and multi-disciplinary implications.