Sustainable development is one of the most important preconditions for preserving resources and balanced functioning of a complete supply chain in different areas. Taking into account the complexity of sustainable development and a supply chain, different decisions have to be made day-to-day, requiring the consideration of different parameters. One of the most important decisions in a sustainable supply chain is the selection of a sustainable supplier and, often the applied methodology is multi-criteria decision-making (MCDM). In this paper, a new hybrid MCDM model for evaluating and selecting suppliers in a sustainable supply chain for a construction company has been developed. The evaluation and selection of suppliers have been carried out on the basis of 21 criteria that belong to all aspects of sustainability. The determination of the weight values of criteria has been performed applying the full consistency method (FUCOM), while a new rough complex proportional assessment (COPRAS) method has been developed to evaluate the alternatives. The rough Dombi aggregator has been used for averaging in group decision-making while evaluating the significance of criteria and assessing the alternatives. The obtained results have been checked and confirmed using a sensitivity analysis that implies a four-phase procedure. In the first phase, the change of criteria weight was performed, while, in the second phase, rough additive ratio assessment (ARAS), rough weighted aggregated sum product assessment (WASPAS), rough simple additive weighting (SAW), and rough multi-attributive border approximation area comparison (MABAC) have been applied. The third phase involves changing the parameter ρ in the modeling of rough Dombi aggregator, and the fourth phase includes the calculation of Spearman’s correlation coefficient (SCC) that shows a high correlation of ranks.

The application of information technology in all areas represents a significant facilitation of all business processes and activities. A competitive business system is hardly imaginable without adequate information technology. Therefore, this paper evaluates the conditions for the implementation of barcode technology in a warehouse system of a company for the manufacture of brown paper. SWOT (Strengths, Weaknesses, Opportunities, Threats) matrix was formed with a total of 27 elements based on which the benefits of the implementation of barcode technology in the warehouse system need to be analysed. For this purpose, a new fuzzy PIPRECIA (PIvot Pairwise RElative Criteria Importance Assessment) method has been developed to evaluate all elements in SWOT matrix. In addition, a part of the new developed approach includes new fuzzy scales for criterion assessment that are adapted to the methodology required by the fuzzy PIPRECIA method. To determine the consistency of the method, Spearman and Pearson correlation coefficients are applied. The results obtained in this study show that weaknesses are most noticeable in the current system. By implementing barcode technology, it is possible to create opportunities defined in SWOT matrix, which, in a very efficient way, allow elimination of the current weaknesses of the system.

Skilled labour shortage in construction industry is a major challenge in South Africa. Therefore, the objective of the study is to assess the factors that cause skilled labour shortage, its consequent effects on the construction industries and how the scenario can be improved. The study was conducted by considering construction industry in the Eastern Cape of South Africa and using a survey research method and conceptual System Dynamics (SD) modelling. Findings reveals that investment, wage challenges, talent management, work environment, training, experience, and Government policy are the important challenges for the skilled labour shortage. Inadequacy of skilled labour considerably impacts the quality of work, productivity, and scheduling. The causal loop diagrams show that enhancement in investment in the labour wages will strengthen the availability of skilled labourers leading to higher productivity, and vice versa. Talent management based on appropriate recruitment and retention policy, staff development programmes and investment in these aspects will augment the skilled labour pool. Also, a better work environment through a policy of health and safety, investment in working condition and supported by Government policy will reduce the attrition of the labourer because of job dissatisfaction, which consequently will reduce the skilled labour shortage in the industry.

The information technology (IT) industry has come to the forefront for economic development of several cities in developing countries such as India and China. Looking at the success of the IT industry in these countries, an argument has emerged that development of such industry in South African cities can revitalize their economy. Therefore, the study examined the potential of development of the IT industry in a South African city by using the case study of a largely service-oriented city—Bloemfontein. A survey research method and system dynamics modeling approach were used. Findings suggest that the city has the potential to emerge as an IT industrial city, however, there exist challenges with regards to infrastructure such as housing, built up space, energy, and attracting the knowledge workers to the city. Appropriate policy interventions to reinforce these infrastructures, which can assist to attract the knowledge workers, will enable enhancement in the earning from the IT industry. Also, the development of the IT industry will strengthen the housing and built up infrastructure for the IT industry as well as enhance the number of knowledge workers in the city.

Traffic safety in the suburban roads of South African cities is a major challenge. Although many studies have explored the contributing factors, the influence of urban factors such as land use, urban form, urban pattern, accessibility and density on the occurrence of traffic crashes have been least explored. This investigation examined the influence of the major urban factors that cause traffic crashes and how road safety can be improved in the suburban arterial roads. For this purpose, a case study was performed using the Bloemfontein city of South Africa. The findings have shown that the level of accessibility (number of accessible roads) from residential areas to arterial roads is the major variable, which causes traffic crashes. Road geometry variables such as the median width and road width influence the occurrence of traffic crashes to a certain extent. Reduction in the number of access roads from the suburban residential areas to the arterial roads, provision of adequate medians in roads with no divided facility along with urban planning interventions, such as appropriate urban pattern, and avoidance of location of urban functions in convoluted areas will enable reduction in the occurrence of traffic crashes and improve road safety in the cities of South Africa.

Purpose: The purpose of this paper is to propose a model for operationalizing the integrated use of lean and sustainability concepts for infrastructure delivery. This model is premised on the need for the attainment of a sustainable built environment through efficient infrastructure delivery. Design/methodology/approach: A case study research design was used in assessing five purposively selected cases within Gauteng province in South Africa. These facilities attained Green Building Council of South Africa ratings of 5- to 6-star, for the rating of green buildings and available evidence of integration of lean principles at the developmental stage. Questionnaires were administered to project’s role-players and semi-structured interviews were conducted with the users and facility managers, in order to elicit data for the model development. Questionnaire survey was adopted for the model validation. Findings: The lean-sustainability platform for infrastructure delivery demonstrates features such as resources, drivers, barriers, activities, outputs, the results, and the ultimate impact. The findings give insight into various components of the model. It validates its robustness and highlights leadership among other critical factors necessary for successful operationalization of the lean-sustainability ethos required to transform the delivery of infrastructure. Practical implications: The developed model provides a transformational route for achieving infrastructure sustainability. The lean-sustainable indicators identified will serve as evaluation tools for assessing lean-sustainability ethos during the delivery phases of infrastructure projects. Originality/value: The model provides a new way of thinking about infrastructure project delivery regarding the need to promote sustainability in the built environment.