Explore Our Latest Journal Issue: ORiON Vol. 41 No. 2

Head of Digital
1 day ago
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We’re proud to announce the release of the latest issue of ORiON, the official journal of ORSSA!

"The current issue of ORiON is comprised of three papers. The first is “A prison bed bug (Cimex lecturalius) dispersion model”, by Ferreira, Malan and Mudimu. This paper presents an interesting stochastic model for the spread of bed bugs within the cell of a South African remand centre.

The second paper in this issue is titled “Statistical residual analysis: A review”, by Mahomani, Ndwandwe and Santana. This paper reviews different parts of statistics as a discipline where residual analysis is used. This type of analysis is used in various contexts and the included paper provides insightful comments as well as examples.

The final paper is “Weighted composition for entropy-regularised reinforcement learning”, by Nyabadza, Rosman, James and Nangue Tasse. This research considers the setting where an agent’s existing skills are to be utilised in order to attain various goals with different preferences.

My thanks go to the authors of these excellent papers. I also thank Dr Elzanie Bothma and Mrs Jeanne Marie Coetzee for their assistance in with the preparation of this issue."

-Jaco Visagie, December 2025

Whether you're an academic, practitioner, or simply passionate about the field, there’s something in this issue for you.

Read the newest issue now by downloading here.

We invite you to explore, share, and engage with this latest collection of work. If you're inspired, we’d love to see your submission in a future issue!

ORiON typically publishes papers in the following categories:

Development of New Theory, which may be useful to Operations Research practitioners, or which may lead to the introduction of new methodologies or techniques.
OR Success Stories, which describe demonstrably successful applications of Operations Research within the Southern African context (at the developing / developed economy interface) or similar environments elsewhere.
OR Case Studies, which might not be "success stories," but which emphasize novel approaches or describe pitfalls in the application of Operations Research.
OR Methodological Reviews, which survey new and potentially useful methodological developments, aimed at Operations Research practitioners especially in Southern Africa.

The above list is by no means exhaustive.

Please note:

The ORiON Journal Website is Temporarily Unavailable

We regret to inform you that the website for the journal ORiON is currently down due to server-related issues. The technical team is working to resolve the problem as quickly as possible.

In the meantime, all new manuscript submissions can be sent directly via email to: jaco.visagie@nwu.ac.za and orionmanager@orssa.org.za .