“MIP approaches are a dead end.”

That‘s a reviewer comment I recently received on a paper about traffic modeling.

So, naturally, I teamed up to write another MIP paper on traffic networks. Here’s our new #ORMS preprint: optimization-online.org?p=34014

Dead end? Judge for yourselves 😉

To all the linear programming enthusiasts out there, how are you gearing up for dual variables day? #orms

How can you manage decision model versions on Nextmv? Let us count the ways… An overview of approaches for managing model versions for testing, roll out, roll back, and provisioning by geographic region, client, or development environment in the context of DecisionOps.

How can you manage decision model versions on Nextmv? 🤔 Let us count the ways... 🧐

Tour examples that manage model versions by dev environment, geographic region, client/customer, and shadow mode: www.nextmv.io/blog/how-can...

#orms #decisionOps #decisionscience #datascience

Coincidentally, we have published a paper with an @isenbergumass.bsky.social PhD student & a colleague in Ukraine on war risk insurance with the focus being on integrating crop and cargo (as in maritime) insurance under war conditions as in Ukraine onlinelibrary.wiley.com/doi/10.1111/... . #orms

Okay, who’s gonna MIP it first? And make a web interface? #orms

In conversation: Building stakeholder trust in decision intelligence Human review and feedback is part of any good decision workflow. Learn what decision algorithm developers and teams can do to increase trust and build confidence.

How to build trust in OR - Insights from Toyota, Hertz, Stitch Fix, and more: hubs.la/Q045TJPk0

→ “Once users start referring to it as ‘our algorithm'...you’re in business.”

#decisionOps #orms #datascience

Great to see a paper co-authored by a former PhD student of mine, now Dr. Ding Zhang, wth Dr. Ben Lev, and co-authors in this issue. #EJOR is one of my FAVORITE #orms journals.

is there also a stream for discrete optimization without machine learning? #orms

Yesterday, during the ceremony of the #Spanish Society of Statistics, Operations Research, and Data Science – #BBVAFoundation Awards, I received the #SEIO Medal. I feel very honored. This comes, of course, with the responsibility of being up to the level of previous medal awardees.

#orms

AI meets Operations Research: what this means for the OR practice – Doing the Math

AI can dramatically speed up model building and algorithm design. But it optimises the problem you give it, not the problem you actually have. That distinction matters enormously in complex decision-making. #orms #ai

doingthemath.nl/ai-meets-ope...

DecisionOps and reflections on the road ahead The future of operations research and decision science hinges on DecisionOps infrastructure, systems of record, and an integrated ecosystem.

As you think about the year ahead, do you want to spend time building (and maintaining) tools to build models? Or do you want to spend time building (and improving) models that deliver value to your business? hubs.la/Q044Qfxr0

#decisionOps #orms #decisionscience #logistics #supplychain

SpringerNature's book advertisement for the book "branch-and-price", shows the cover, the title and "open access"

some three weeks ago, our #openaccess book on "branch-and-price" got finally published; you can download it for free here: link.springer.com/book/10.1007/978-3-031-9...

#orms

Join us on March 5 for my #orms talk about uncertain #bileveloptimization!

Extended Deadline for #ICBO 2025, the
International Conference on Bilevel Optimization in Pittsburgh, US.

bileveloptimization.org/icbo/2026/in...

Register now and let's meet in August!

#orms #bilevel #optimization #conference

Yesterday we organized a presentation session about teaching practical hands-on courses for the Center of Algorithmics and Optimization (algoopt.rwth-aachen.de) at RWTH Aachen.

Proof-reading chapter 2: Optimistic vs pessimistic #bilevel problems.

What is a pessimistic problem? Why is it different? And why is it actually not as different as many people thought for a long time …

#orms #optimization

MEAB stands for the Magazine Editorial Advisory Board meeting of INFORMS. It is an honor to be its Chair and to work with both INFORMS staff and outstanding committee members. Professional publications are critical for keeping our great #orms community informed and engaged.

I love doing research. It's like being a "detective." I read lots of mysteries as a child. Nowadays, it seems that I'm the go-to person when it comes to tracking down relatives & former students of females, who are being increasingly recognized, in #orms with awards, even posthumously. Glad to help.

Getting optimization solutions into the hands of stakeholders faster at Grubhub How Grubhub’s data science team uses Nextmv to accelerate model development, ship models as microservices, and build trust with business users.

Learn how Grubhub’s data science team uses Nextmv to accelerate model development, ship models as microservices, and build trust with business users: hubs.ly/Q043PF4d0

#orms #foodlogistics #delivery #datascience #decisionscience #DecisionOps

As US agriculture flails, farmers see big corn acres as best bet to break even U.S. farmers, though punished by slumping prices after last year's monster corn harvest, are expected to cut back only slightly on their plantings of the grain in 2026 as they brace for a fourth strai...

www.reuters.com/world/us/us-... We continue to work on #agricultural #trade & #policies during these challenging times for farmers. Our latest #orms paper with a case study on #soybeans published free access, thanks to the Journal of the @theorsociety.bsky.social www.tandfonline.com/doi/full/10....

Question for #orms people: do you know any problem-specific cutting planes that are not too hard to explain and separate and would improve performance compared to a baseline MIP solver (e.g. SCIP, Gurobi)? Asking because its more fun for students if they implement something and it helps performance

A new book is coming:

"Linear and Mixed-Integer Bilevel Optimization: Theory and Algorithms"

by Ivana Ljubić, @yasminebeck.bsky.social, and myself.

Let's start the last round of proof-reading! Stay tuned for regular updates on its content.

#orms #bilevel #optimization #algorithms #textbook

Decision Optimization with GPU acceleration: In conversation with the NVIDIA cuOpt team How can GPUs improve decision optimization workflows? In what ways will solving optimization problems change? How does this change the way technology leaders think about their AI strategies? We spoke ...

→ How can GPUs improve optimization workflows?
→ How will solving optimization problems change?
→ How should tech leaders rethink their AI strategies?

Read the discussion about the NVIDIA cuOpt decision engine and what’s next: hubs.la/Q042Jv840

#DecisionOps #DecisionScience #orms #cuOpt #nvidia

Springer advertisement for the "Branch-and-Price" book

our #openaccess book on "branch-and-price" is finally published; you can download it here link.springer.com/book/10.1007...

#orms @springernature.com

Postdoc In Symmetry Handling in Bilevel Programming

postdoc opportunity for three years in Eindhoven, within the project "Exploiting Symmetries for Faster Bilevel Optimization Algorithms," together with Christopher Hojny #orms

www.tue.nl/en/working-a...

Bucket Graph Meta-Solver for the Resource Constrained Shortest Path Problem #orms

inria.hal.science/hal-05486295...

Release passagemath-10.8.1.rc3 · passagemath/passagemath Final release candidate passagemath-highs This new pip-installable package ships a mixed-integer linear programming backend using the HiGHS solver. Package upgrades CVXpy has been upgraded from ver...

Final release candidate 10.8.1.rc3 of passagemath, the pip-installable modularized fork of #SageMath.
github.com/passagemath/...
#Python #OpenSource #Mathematics #orms

Excited to have been part of my first EURO Executive Committee meeting ! Looking forward to work with my colleagues in the #EC for our #orms community !

Today we are celebrating OR Awareness Day. We asked our members to describe what Operational Research means to them. Here are some of their answers below.

#ORAwarenessDay #ORDay #ORMS #ThisIsOR

Eduardo Uchoa gesturing, looking at his audience

students in a seminar room listening to the professor in the front

three scientists sitting around a table, two more standing in the door, a projector displays a book page

in the morning, Eduardo Uchoa presented the development of branch-and-price for vehicle routing in our column generation class; in the afternoon, together with Marc Pfetsch, we discussed future developments in SCIP -- a happy and productive day for us computational optimizers

#orms