https://www.ajol.info/index.php/orion/issue/feed 2022-08-03T12:58:13+00:00 Jaco Visagie jaco.visagie@nwu.ac.za Open Journal Systems <p><em>ORiON</em> is the official journal of the <strong><em>Operations Research Society of South Africa (ORSSA)</em></strong> and is <em>published biannually</em>. Papers in the following categories are typically published in ORiON:<br>• Development of new theory, which may be useful to operations research (OR) practitioners, or which may lead to the introduction of new methodologies or techniques.<br>• OR success stories, which describe demonstrably successful applications of OR within the Southern African context (at the developing/developed economy interface) or similar environments elsewhere.<br>• OR case studies, which might not be “success stories,” but which emphasize novel approaches or describe pitfalls in the application of OR.<br>• OR methodological reviews, which survey new and potentially useful methodological developments, aimed at OR practitioners especially in Southern Africa.<br>The above list is by no means exhaustive.</p> <p>More information about the journal can be found at&nbsp;<a title="http://orion.journals.ac.za/pub" href="http://orion.journals.ac.za/pub" target="_blank" rel="noopener">http://orion.journals.ac.za/pub</a> and&nbsp;<a title="http://www.orssa.org.za/wiki/pmwiki.php?n=Main.ORiON" href="http://www.orssa.org.za/wiki/pmwiki.php?n=Main.ORiON" target="_blank" rel="noopener">http://www.orssa.org.za/wiki/pmwiki.php?n=Main.ORiON</a></p> <p><strong>Popular ORiON Publication Topics/Subjects</strong><br>• Arrival processes, queuing theory and applications<br>• Assignment, allocation and timetabling problems<br>• Conflict resolution and multi-criteria decision analysis<br>• Data mining, forecasting, statistical analysis and applications<br>• Decision support and decision making<br>• Demand, logistics and supply chain analysis<br>• Elections, government and development<br>• Financial investments, risk analysis and portfolio optimisation<br>• Graph &amp; network theory and applications<br>• Inventory control theory and management<br>• Knapsack, packing and cutting problems<br>• Metaheuristics (e.g. genetic algorithms, tabu searches, simulated annealing)<br>• Mathematical (linear, nonlinear, integer, goal, dynamic) programming<br>• Natural resource management and conservation ecology<br>• Philosophy, history, marketing and teaching of OR<br>• Production management and project scheduling<br>• Reliability, repairability and availability<br>• Theoretical and computer simulation<br>• Transportation networks, vehicle routing and variations of the travelling salesman problem</p> https://www.ajol.info/index.php/orion/article/view/229189 2022-08-03T07:30:58+00:00 T. Olivier Hennie.Kruger@nwu.ac.za H. Kruger Hennie.Kruger@nwu.ac.za

<p>Natural disasters often cause large-scale destruction and many studies focus on the support and evacuation of disaster victims. During a disaster,&nbsp; timely provision of relief items, such as medical supplies, is a critical task and is considered one of the fundamental functions in a humanitarian&nbsp; logistics chain. However, many practical problems and challenges often occur that make the smooth operation of humanitarian logistic functions a&nbsp; difficult and sometimes impossible task. One such problem is the accessibility to disaster areas where roads, railway lines and other transport&nbsp; routes have been demolished and which causes residents or other victims to be cut off from any assistance. In the event that no or little&nbsp; infrastructure exists, humanitarian workers must find new and innovative ways of reaching people in need. In this paper, a grid-based maze that can&nbsp; be solved to find optimal traversable routes in a disaster area is proposed. A matrix maze generation approach is suggested that can be solved&nbsp; by the Lee algorithm to find an optimal route. To illustrate the proposed methodology, a software solution was developed and applied to a real-&nbsp; world case study. The results obtained confirm that the proposed methodology, combined with the Lee algorithm as a solution strategy, delivers&nbsp; useful and accurate results that humanitarian workers may utilise to assist with the evacuation of victims and the transportation of relief items.&nbsp;</p>

2022-08-03T00:00:00+00:00 Copyright (c) 0 https://www.ajol.info/index.php/orion/article/view/229193 2022-08-03T07:45:37+00:00 I. Fabris-Rotelli inger.fabris-rotelli@up.ac.za M.J. von Maltitz inger.fabris-rotelli@up.ac.za A. Smit inger.fabris-rotelli@up.ac.za S. Das inger.fabris-rotelli@up.ac.za D. Roberts inger.fabris-rotelli@up.ac.za G. Maribe inger.fabris-rotelli@up.ac.za D. Maposa inger.fabris-rotelli@up.ac.za F.M. Correa inger.fabris-rotelli@up.ac.za

<p>This discussion paper delves into the current state of academic Statistics in South Africa, specifically the development of an early career academic&nbsp; supervisor in Statistics. The discussions held by the authors on this topic since 2020 have resulted in clear need for action by early career academics in&nbsp; Statistics. This discussion paper motivates a solution involving a guiding rubric for the doctoral thesis coupled with an active early career supervisor&nbsp; network across South Africa.</p>

2022-08-03T00:00:00+00:00 Copyright (c) 0 https://www.ajol.info/index.php/orion/article/view/229195 2022-08-03T07:53:11+00:00 J.S. Allison James.Allison@nwu.ac.za L. Santana James.Allison@nwu.ac.za M. Smuts James.Allison@nwu.ac.za

<p>No Abstract.</p>

2022-08-03T00:00:00+00:00 Copyright (c) 0 https://www.ajol.info/index.php/orion/article/view/229197 2022-08-03T12:58:13+00:00 Y. Chhana Yoko.Chhana@wits.ac.za

<p>No Abstract.</p>

2022-08-03T00:00:00+00:00 Copyright (c) 2022 https://www.ajol.info/index.php/orion/article/view/229210 2022-08-03T11:53:28+00:00 J du Pisanie johan.dupisanie@monocle.co.za

<p>This article provides commentary on the article titled Development of an early career academic supervisor in Statistics: A discussion on a guiding&nbsp; rubric. The article aims to address the some of the main points raised and provide an overview of a current blueprint of how these can be implemented.</p>

2022-08-03T00:00:00+00:00 Copyright (c) 0 https://www.ajol.info/index.php/orion/article/view/229211 2022-08-03T12:04:28+00:00 L.P. Fatti paulfatti@gmail.com

<p>No Abstract.</p>

2022-08-03T00:00:00+00:00 Copyright (c) 0 https://www.ajol.info/index.php/orion/article/view/229212 2022-08-03T12:13:28+00:00 J. Larney Janette.Larney@nwu.ac.za M. Gericke Janette.Larney@nwu.ac.za

<p>No Abstract.</p>

2022-08-03T00:00:00+00:00 Copyright (c) 0 https://www.ajol.info/index.php/orion/article/view/229213 2022-08-03T12:24:05+00:00 S.M. Millard sollie.millard@up.ac.za F.H.J. Kanfer sollie.millard@up.ac.za

<p>No Abstract.</p>

2022-08-03T00:00:00+00:00 Copyright (c) 0 https://www.ajol.info/index.php/orion/article/view/229214 2022-08-03T12:37:41+00:00 T. Sandrock trudies@sun.ac.za J. Nienkemper-Swanepoel trudies@sun.ac.za D.W. Uys trudies@sun.ac.za

<p>No Abstract.</p>

2022-08-03T00:00:00+00:00 Copyright (c) 0 https://www.ajol.info/index.php/orion/article/view/229215 2022-08-03T12:45:18+00:00 Gary Sharp gary.sharp@mandela.ac.za

<p>No Abstract.</p>

2022-08-03T00:00:00+00:00 Copyright (c) 0 https://www.ajol.info/index.php/orion/article/view/229216 2022-08-03T12:51:33+00:00 J. van Appel jvanappel@uj.ac.za

<p>No Abstract.</p>

2022-08-03T00:00:00+00:00 Copyright (c) 0