Search Results (520)

This study reviews the status and direction of Short Food Supply Chains (SFSCs) in Africa, examining their potential to enhance food security, resilience, and smallholder empowerment. Synthesising 69 peer-reviewed studies from 25 African countries, the analysis identifies nine recurring themes consolidated into four clusters: governance, resilience and sustainability; urbanisation and participation; innovation and logistics; and inclusion and equity. The findings show that research is concentrated in South Africa, Ghana, and Kenya, but also highlight emerging diversity across the continent. SFSCs strengthen local resilience and urban food system integration, yet remain limited by weak digital infrastructure, policy fragmentation, and underdeveloped equity measures, especially regarding youth and gender. The review contributes to debates on food sovereignty, political ecology, and sustainability transitions by situating African SFSCs within broader food system transformations. It proposes a policy roadmap prioritising participatory governance, digital market innovation, and inclusive procurement as pathways for institutionalising SFSCs in Africa. Full article

The selection of the most economically advantageous tender (MEAT) in public procurement procedures requires transparent evaluation systems capable of integrating heterogeneous criteria, including qualitative ones, to reconcile quality and cost. This systematic review analyzes 74 studies published between 1998 and 2023 to explore the application of multi-criteria decision analysis (MCDA) methods in public construction procurement. The vast majority of MCDA applications focus on the award phase, with constant growth over the last 10 years. However, applications in the prequalification and verification phases are much less frequent and remain under-represented. Geographically, Europe is the most active area in terms of publications, followed by China and some countries in the Asia-Pacific area. In these regions, MCDA has been employed more systematically over time, while in other areas (e.g., Africa, Latin America), applications are sporadic or absent. Analytic Hierarchy Process (AHP) is confirmed as the most widely used technique. Emerging techniques (such as BWM, MABAC, EDAS, VIKOR, advanced TOPSIS) show greater computational rigor and in some cases better theoretical properties, but are less used due to complexity, less practical familiarity and the lack of accessible software tools. The operationalization of environmental and social criteria is still poorly standardized: clear indications on metrics, measurement scales and data sources are often lacking. In most cases, the criteria are treated in a generic or qualitative way, without common standards. Furthermore, the use of sensitivity analyses and procedures for aggregating judgments between evaluators is limited, with a consequent risk of poor robustness and transparency in the evaluation. In order to consider proposing a framework or guidelines based on the review findings, a six-step operational framework that connects selection of criteria and their operationalization, choice of method based on the context, robustness checks and standard minimum reporting, with clear assignment of roles and deliverables, is provided. The framework summarizes and makes the review evidence applicable. Full article

Public healthcare infrastructure is among the most energy-intensive of public facilities; therefore, it needs to become more environmentally and economically sustainable by increasing energy efficiency and improving service reliability. Achieving these goals requires modernizing hospital energy systems with renewable energy sources (RESs). This process often involves Energy Service Companies (ESCOs), which propose integrated RES technologies with tailored contractual schemes. However, comparing ESCO offers is challenging due to their heterogeneous technologies, contractual structures, and long-term performance commitments, which make simple cost-based assessments inadequate. This study develops a structured Multi-Criteria Decision-Making (MCDM) methodology to evaluate energy projects in public healthcare facilities. The framework, based on the Analytic Hierarchy Process (AHP), combines both quantitative (net present value, stochastic simulations of energy cost savings, and CO₂ emission reductions) with qualitative assessments (redundancy, flexibility, elasticity, and stakeholder image). It addresses the lack of standardized tools for ranking real-world ESCO proposals in public procurement. The approach, applied to a case study, involves three ESCO proposals for a large hospital in Southern Italy. The results show that integrating photovoltaic generation with trigeneration achieves the highest overall score. The proposed framework provides a transparent, replicable tool to support evidence-based energy investment decisions, extendable to other public-sector infrastructures. Full article

Government-invested Engineering, Procurement, and Construction (EPC) projects often encounter challenges, such as ambiguous value-added pathways and undefined key driving mechanisms, which impede efficiency improvements during implementation. To systematically elucidate the value-added pathways and core driving mechanisms in these projects, this study identified and distilled 20 critical influencing factors across four dimensions—contract cost, organization, technology, and environment—through a combination of a literature review, case analysis, and a questionnaire survey yielding 68 valid responses. Employing a DEMATEL–TAISM–MICMAC hybrid model, the research conducted an in-depth analysis: the DEMATEL method quantified the interdependencies among factors and identified key causal elements; a TAISM-directed topological hierarchy diagram was constructed to clearly delineate the hierarchical transmission pathways; and the MICMAC model was utilized for driver–dependency analysis, classifying factor roles and providing cross-validation from three analytical perspectives. The results indicate that S₁₂ (collaborative participation in early planning and design phases) exhibits the highest causal influence and serves as the core driving factor, while S₁ (detailed and explicit contractual clauses) and S₁₂ are positioned at the root level of the hierarchical model, functioning as foundational independent factors that regulate the entire system. The value-added pathways are characterized by a hierarchical transmission logic of “root level → transitional level → direct level”. Based on these findings, the study proposes a system optimization strategy of “strengthening the root level, optimizing the transitional level, and safeguarding the direct level”, thereby offering both theoretical insights and practical guidance for enhancing the value-added efficiency of government-invested EPC projects. Full article

Power engineering construction serves as the cornerstone of modern social development. Against the backdrop of new power system development, this study employs field investigations, case analysis, and expert discussions to conduct an in-depth analysis of the current status, existing problems, and characteristics of safety risk control in China’s power engineering construction during the 14th Five-Year Plan period. Through systematic analysis of 59 accident cases, 66 distinct causes are identified across 14 categories. Chi-squared testing quantitatively determines the top three risk factors: hollowing out of construction units’ own workforce (χ² = 10.22), deficiencies in risk classification and hierarchical implementation (χ² = 9.0), and inadequate hazard identification (χ² = 6.25). Through brainstorming and expert discussions, 11 critical risks in China’s power engineering construction have been identified, and a set of countermeasures has been formulated. These include nine enterprise-level initiatives such as deepening engineering procurement construction management, improving training systems, optimizing bidding methods, and implementing management principles, along with four regulatory measures targeting the National Energy Administration of China and its regulatory agencies. This study innovates by combining quantitative chi-squared analysis with expert-derived countermeasures, offering a model for transitioning economies. While the sample size imposes limitations on generalizability, this research can significantly improve the intrinsic safety management level of power construction enterprises in China and provides valuable reference experience for similar transitioning countries developing energy infrastructure. Full article

Farm-to-school (F2S) partnerships connect schools with local producers to enhance student access to healthy, local foods and support regional food systems. Despite widespread implementation, few studies have examined the system-level structures that facilitate effective and sustainable F2S efforts across diverse community contexts. This study utilized a mixed-methods system mapping approach to analyze four F2S systems on California’s Central Coast. Data sources included public data sources, in-person site observations, and local expert resources. The researchers hypothesized that successful F2S systems would share core features that support implementation and long-term sustainability, including aligned values among stakeholders, the presence of identified champions, and multi-directional pathways for food procurement and communication. They constructed system maps and compared them in order to identify both common structural features and context-specific adaptations. Findings support the hypothesis and highlight the critical role of community-based organizations and distributors and/or aggregators in brokering relationships, coordinating resources, and reducing administrative burdens. Institutionalization through wellness policy integration and district-level support further distinguished higher-functioning systems. Identified barriers included inequities in procurement infrastructure, limited funder engagement, and uneven access to local food sources. System mapping offers a valuable tool to understand, strengthen, and scale equitable F2S implementation. Full article

Quantifying the environmental benefits of designing buildings for disassembly and flexibility (DfD/DfF) remains challenging within current life cycle assessment (LCA) frameworks. This study assesses the climate impact of a two-story Swedish timber multifamily building (377 m²) designed for future transformation and reuse. An LCA covering modules A–D was performed for one linear scenario (S0: demolition without reuse) and three circular scenarios (S1: layout change, S2: relocation, S3: vertical extension), applying three allocation methods: 100:0, 50:50, and system expansion. All circular scenarios reduced climate impact compared to the linear reference, though to varying degrees. Reductions ranged from 8–50% within the system boundary (A–C), depending on scenario and allocation method. While the 50:50 approach attributed significant reductions within A–C, the 100:0 method emphasized benefits primarily in module D. The 50:50 method yielded the lowest impacts within the system boundary, whereas system expansion showed the largest overall reductions but relied on uncertain assumptions. The study concludes that including future scenarios in LCA is more effective in promoting circularity than the specific choice of allocation method. It emphasizes the need for standardized frameworks that account for multiple use cycles and support fair comparisons in policy and procurement. Full article

This paper proposes an optimal scheduling strategy for coal-dedicated railway integrated energy systems, leveraging coordinated electric boiler and thermal storage operation to enhance economic efficiency, improve wind power integration, and reduce carbon emissions. By decoupling the traditional “heat-led-electricity” constraint of combined heat and power (CHP) units, the approach increases operational flexibility and wind power accommodation capacity. A demand response model further optimizes demand-side dispatchability, while a tiered carbon trading mechanism systematically addresses emission costs. The resulting day-ahead scheduling model minimizes total costs—including electricity procurement, wind curtailment penalties, carbon trading, and maintenance expenses—demonstrating superior performance in case studies: a 12.5% reduction in carbon emissions, 56.8% lower operating costs versus conventional methods, and full (100%) wind power utilization. Full article

The aim of this work is to determine the production function using the method of complex-valued economics as a criterion for the management of the centralized heat supply of a city. This paper used the methodology of using stepped production functions of complex variables with real coefficients as a tool to perform dynamic analysis and forecasting of production results, allowing the performance of Manufacturing Execution System tasks of the heat supply system to be tracked. Based on this, a justified selection of a management criterion was made, objectively reflecting both the passive and active components of the administrative and economic activities of the heat supply enterprise. A comparative analysis of production functions was conducted to identify a predictive model for resource provision in the process of heat energy generation. A predictive model of resource provision was developed based on the capital/labor ratio of the enterprise, using a production function with complex variables. In other words, determining the production function allows the analysis of both the quantity and quality of resources used to produce 1 Gcal of energy, as well as the forecast of resource procurement to ensure a reliable and cost-effective heat supply. Full article

The creation of the LitUCA lithotheque represents a significant methodological advance in geoarchaeological research in the southwest of Spain. This article presents a systematic framework for the conservation, documentation, and digital integration of lithic collections, with particular emphasis on data traceability, reproducibility, and interoperability. The methodology adopted is inspired by international standards, adapted to the regional context, and incorporates rigorous protocols for sampling, analytical documentation, and a relational database system. The collection comprises over 5000 items, all of which are catalogued, photographed, and characterised both petrographically and morphometrically, with metadata being progressively aligned with FAIR principles, aiming for full compliance in the future. Preliminary analysis demonstrates the collection’s capacity to facilitate comparative studies of procurement, mobility, and lithic technological organisation. Furthermore, the digital infrastructure developed promotes remote access and fosters both academic and societal collaboration. Despite ongoing challenges regarding sample representativeness and interoperability, LitUCA stands as a scalable and versatile model for the management of lithotheques. This study highlights the importance of integrated lithotheques for scientific progress, heritage management, and interdisciplinary education. Full article

China’s healthcare expenditure tripled during 2010–2019, prompting the nationwide implementation of centralized volume-based procurement (CVBP). While effective in reducing drug prices, CVBP introduces sustainability challenges including supply chain vulnerabilities and welfare trade-offs. This study develops a pharmaceutical sector-embedded computable general equilibrium (CGE) model to quantify CVBP’s multidimensional sustainability impacts. Using China’s 2020 Social Accounting Matrix (SAM) with simulated 10–50% price reductions, key findings reveal that (1) >40% price reductions trigger sectoral output reversal; (2) GDP exhibits an inverted U-shape; (3) household income declines despite corporate/government gains; and (4) industrial contraction impairs innovation capacity and employment stability. Our analysis identifies potential sustainability risks, emphasizing the need for rigorous empirical validation prior to implementing aggressive price reduction policies, and underscores the importance of integrating supply chain considerations into procurement policy design. This approach maximizes resource allocation efficiency while advancing socioeconomic resilience in healthcare systems. Full article

This paper investigates the strategic and institutional dynamics of centralized public procurement in Romania, with a specific focus on the National Office for Centralized Procurement (ONAC) and its role in enabling digital transformation across technical universities. Using a qualitative case study methodology, the research evaluates ONAC’s capacity to implement procurement policy aligned with sustainability and digital governance objectives. Drawing on official reports, legislative documents, and secondary data sources, the paper applies an analytical framework covering institutional performance, technological adaptation, and policy coherence. The findings highlight both the opportunities and challenges of centralized procurement, emphasizing systemic rigidities, underutilization of digital tools, and weak feedback mechanisms. The study contributes to the literature on strategic procurement and digital public management by offering a grounded assessment of governance capacity and sustainability alignment in a transitional EU context. Full article

While blockchain technology (BT) has gained attention in the construction industry, limited research has focused on its application in sustainable construction procurement management (SCPM). Addressing this gap, the present study investigates the key drivers influencing BT adoption in SCPM using a hybrid methodological approach. This study includes a systematic review of academic and grey literature, expert consultations, and quantitative analysis using advanced fuzzy-based algorithms, k-means clustering, and social network analysis (SNA). Data were collected through an online survey distributed to professionals experienced in SCPM and blockchain implementation. The Fuzzy DEMATEL results identify “high quality”, “decentralization and data security”, and “cost of the overall project” as the most critical drivers. Meanwhile, SNA highlights “stability of the system”, “overall performance of the project”, and “customer satisfaction” as the most influential nodes within the network. These insights provide actionable guidance for industry stakeholders aiming to advance SCPM through blockchain integration and contribute to theoretical advancements by proposing novel analytical frameworks. Full article

Digitalization is rapidly reshaping the global construction industry; however, its adoption in developing countries, such as Pakistan, remains limited and uneven. Hence, this study investigates and evaluates the current status of digital technology integration in Pakistan’s construction industry, with a primary focus on key tools, implementation challenges, and necessary policy interventions. Using a three-phase mixed-method approach involving a literature review, expert interviews, and a nationwide survey, this research identifies Building Information Modeling, Geographic Information Systems, and E-Procurement as essential technologies with strong potential to improve transparency, efficiency, and collaboration. However, adoption is hindered by a lack of awareness, limited technical expertise, and the absence of a cohesive national policy. This study also highlights that the private sector shows greater readiness compared to the public sector; however, systemic barriers persist across both sectors. Based on stakeholder insights, a three-part policy strategy was also proposed. This includes establishing a national regulatory framework, investing in capacity-building programs, and providing financial or institutional incentives to encourage the adoption of these measures. The findings emphasize that digitalization is not just a technical upgrade; it represents a pathway to improved governance and more efficient infrastructure delivery. With timely and coordinated policy action, the construction industry in Pakistan can align itself with global innovation trends and move toward a more sustainable and digitally empowered future. Full article

A comprehensive techno-economic assessment was undertaken to determine the viability of bioethanol production from sugarcane bagasse in Thailand through organosolv fractionation, incorporating three distinct catalytic systems: sulfuric acid, formic acid, and sodium methoxide. Rigorous process simulations were executed using Aspen Plus, facilitating the derivation of detailed mass and energy balances, which served as the foundational input for downstream cost modeling. Economic performance metrics, including the total annualized cost and minimum ethanol selling price, were systematically quantified for each scenario. Among the evaluated configurations, the formic acid-catalyzed organosolv system exhibited superior techno-economic attributes, achieving the lowest unit production costs of 1.14 USD/L for ethanol and 1.84 USD/kg for lignin, corresponding to an estimated ethanol selling price of approximately 1.14 USD/L. This favorable outcome was attained with only moderate capital intensity, indicating a well-balanced trade-off between operational efficiency and investment burden. Conversely, the sodium methoxide-based process configuration imposed the highest economic burden, with a TAC of 15.27 million USD/year, culminating in a markedly elevated MESP of 5.49 USD/kg (approximately 4.33 USD/L). The sulfuric acid-driven system demonstrated effective delignification performance. Sensitivity analysis revealed that reagent procurement costs exert the greatest impact on TAC variation, highlighting chemical expenditure as the key economic driver. These findings emphasize the critical role of solvent choice, catalytic performance, and process integration in improving the cost-efficiency of lignocellulosic ethanol production. Among the examined options, the formic acid-based organosolv process stands out as the most economically viable for large-scale implementation within Thailand’s bioeconomy. Full article