• Optimal pricing and production lot size for two rates of production with price-sensitive demand, price break-even point, and profit maximisation in higher order equation 

  Sivashankari, C.K.,; Nithya, T.; Yadavalli, Venkata S. Sarma (Southern African Institute for Industrial Engineering, 2024-05-31)

  In the present study, optimal pricing and optimal lot size production policy models with price-sensitive demand of deteriorating products are considered, taking into account two distinct production rates. It is possible ...
• Do socially responsible and risk-tailored portfolios win? A comparative analysis 

  Van Niekerk, Melissa; Trent, Nadia M. (Southern African Institute for Industrial Engineering, 2024-05-31)

  This study introduces three extensions of the Markowitz portfolio selection model: (1) matching portfolio risk to individual investors’ risk appetite; (2) excluding certain shares; and (3) environmental, social, and ...
• Logistic facility identification from spatial time series data 

  De Beer, Dirk Johannes; Joubert, Johan W. (Elsevier, 2024-12)

  Vehicle telemetry data is becoming more ubiquitous with increasingly sensorised vehicles, but making sense of the vehicles' purpose remains challenging without additional context. Clustering the vehicle activity data and ...
• System dynamics applied in enterprise engineering - a systematic literature review 

  Hussain, Huda; De Vries, Marne (Emerald, 2024)

  PURPOSE : This study aims to investigate the combined use of System Dynamics (SD) applications in Enterprise Engineering (EE) research and practice. SD application in EE is becoming widely accepted as a tool to support ...
• A lot sizing model for a deteriorating product with shifting production rates, freshness, price, and stock-dependent demand with price discounting 

  Tshinangi, Kapya; Adetunji, Olufemi; Yadavalli, Sarma (Ram Arti Publishers, 2024-06)

  Many production systems need to be able to change the rate at which they manufacture products for various reasons, hence, the need to find the optimal lot size under these multiple levels of production. This research ...
• Can human lean practices affect business performance? Evidence from Zimbabwe service industries 

  Machingura, Tinotenda; Adetunji, Olufemi; Muyavu, Ashleigh Tatenda; Maware, Catherine (Emerald, 2024-09)

  PURPOSE : This research seeks to explore the interrelationships between human lean practices (HLP) and their impact on the business performance of service industries. DESIGN/METHODOLOGY/APPROACH : A questionnaire ...
• The impact of soft lean practices on business performance : mediating role of customer satisfaction 

  Machingura, Tinotenda; Muyavu, Ashleigh Tatenda; Adetunji, Olufemi (Emerald, 2024)

  PURPOSE : Many firms have adopted different methodologies such as lean management to increase customer satisfaction. This is because they need to respond to customer demands for improved products and responsive service. ...
• The effect of vehicle load on urban freight emissions 

  Joubert, Johan W. (Elsevier, 2024)

  Several city logistics initiatives focus on lowering last-mile deliveries’ environmental impacts. And here, the impact is often the total (absolute) pollutants emitted by urban goods vehicles and the population's exposure ...
• Electrifying an urban delivery fleet : a case study 

  Janse van Rensburg, Cayla; Joubert, Johan W. (Elsevier, 2024)

  When carriers consider electrifying their delivery fleets, it is not only a societal and moral obligation, given road traffic's impact on emissions. It has also become an economic consideration as sustainability metrics ...
• BRT network design for transit cost reduction in Cape Town, South Africa 

  Nnene, Obiora A.; Zuidgeest, Mark H.P.; Joubert, Johan W. (Elsevier, 2023)

  Car dependency in Cape Town, South Africa, like in many modern cities is high but comes at a high cost. One of these is significant network congestion, especially during peak commuting periods. A strategy adopted by ...
• Prioritizing factors influencing the performance of a supply chain system using hybrid structural interaction matrix 

  Makinde, O.A.; Mowandi, T.; Ayomoh, Michael Kweneojo; Munyai, T.T.; Nesamvuni, A.E. (Journal Management System, 2023-02)

  Ascertaining and prioritizing the various factors that can influence the performance of a supply chain system is vital towards creating measures that are tailored towards controlling these factors, in order to ensure a ...
• Robust facility location of container clinics : a South African application 

  Karsten, C.; Bean, Willemiena Lodewika; Van Heerden, Q. (Ram Arti Publishers, 2023)

  There is a lack of dynamic facility location models for developing countries that consider the changes in the problem environment over time, such as patient population and population migration. Therefore, this paper ...
• Reliability analysis of the functional capabilities of an autonomous vehicle 

  Ndlovu, Brain Ndumiso; Ayomoh, Michael Kweneojo (Ram Arti Publishers, 2023)

  The reliability of autonomous vehicles (AVs) is a research domain of high interest, covering a diverse pool of researchers, captains of smart auto industries, government agencies, and technology enthusiasts. The reliability ...
• Impact of road grade on the risk profile of driver behavior 

  Gerber, Jeanne-Marie; Joubert, Johan W. (Sage, 2023-02)

  Data generated from telemetry devices, such as acceleration and speed, are used in a variety of industries to determine the risk profile of a driver. This paper considers the addition of road gradient as a contextual ...
• Integration of Multi-State Systems in a series of EPQ models for deteriorating products 

  Kapya, Tshinangi Fabrice (University of Pretoria, 2024-04-11)

  This thesis contains a collection of problems dealing with the modelling and optimisation of multi-state production systems, hence addressing challenges within the broader category of flexible manufacturing. These systems ...
• A comprehensive case study on integrated redundant reliability model using k-out-of-n configuration 

  Velampudi, Srinivasa R.; Akiri, Sridhar; Subbara, Pavan K.; Yadavalli, Venkata S. Sarma (Gnedenko Forum, 2023-03)

  Designers may introduce a system with multiple technologies in series to improve system efficiency. The configuration can be applied to k out of n systems if each technology contains k out of n factors. The k out of n ...
• The mediatory role of the environmental performance function within the lean-green manufacturing sustainability complex 

  Machingura, Tinotenda; Adetunji, Olufemi; Maware, Catherine; Adetunji, Olufemi; Maware, Catherine (Elsevier, 2024-06)

  PURPOSE : The objective of the study is to explore the mediatory role of the environmental performance of organisations on their economic and social performances. It demonstrates that implementing environmental management ...
• The survivability of cycling in a co-evolutionary agent-based model 

  Hitge, Gerhard; Joubert, Johan W. (Springer, 2024)

  Many cities plan to grow cycling as a prominent mode to improve accessibility and environmental and financial sustainability. However, relatively few cities have made meaningful headway in this direction. Policymakers would ...
• Heuristic solutions to minimise makespan in a hybrid flow shop scheduling environment with energy consumption constraints in steel making 

  Baloi, Brighton Miyelani (University of Pretoria, 2024-02-14)

  Due to its advantage over other alternative energy efficient methods in cost savings, there has been an increasing interest in applying energy efficient scheduling in energy intensive industries faced with a conundrum of ...
• Sustainability of power generation for developing economies : a systematic review of power sources mix 

  Ibrahim, Hanif Auwal; Ayomoh, Michael; Bansal, Ramesh C.; Gitau, Michael Njoroge; Yadavalli, Venkata S. Sarma; Naidoo, Raj (Elsevier, 2023-05)

  With affordable and clean energy being one of the Sustainable Development Goals (SDG7), most developing economies are still caught up with the dilemma of inadequate power supply and heavy dependence on fossil fuel. This ...

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