The GAMS blog

GAMS at the Mathematical optimization for hidden champions (102. Meeting) 2019 in Pforzheim

Apr 14, 2019 News Conference Report
GAMS staff Michael Bussieck and Robin Schuchmann attended the meeting Mathematical Optimization for the Hidden Champions of the GOR working group Real World Optimization at the Chamber of Industry and Commerce (IHK) in Pforzheim, Germany. The focus of the 2-day event was on optimization-based analysis and decision making, especially from the perspective of small businesses in the manufacturing industry.
CAPD Annual Review Meeting (Carnegie Mellon)

Mar 14, 2019 News Conference Report
As usual, CAPD was a well-organized 2-day conference. It is small enough that there are no parallel sessions. So the group was together from breakfast through dinner, which allows for and fosters lots of interaction on professional and social levels. The venue - CMU’s campus and the conference dinner at Monterey Bay - was very pleasant and conducive to good discussion.
IEWT Conference in Vienna

Feb 27, 2019 News Conference Report
This February, I spent three days at IEWT (Internationale Energiewirtschaftstagung) in beautiful Vienna, Austria. Even though the “I” stands, supposedly, for “International”, virtually all of the attendants were either Austrian or German.The event was very successfully hosted by TU Vienna - which appears to be the alma mater of most Austrian participants.
Army Goes Bowling

Nov 21, 2017 GAMS Applications
The announcement that the US Military Academy’s football team, the Army West Point Black Knights, had received a bid to the Armed Forces Bowl on 23 Dec was good news for the team and its fans and supporters everywhere, but it posed a problem for those tasked with scheduling the Term End Exams at the Academy.
Scaling

Aug 14, 2017 Tips McCarl Newsletter
Sometimes models do odd things like reporting problems as infeasible, stuck or falsely optimal when scaling is the real issue. To avoid this or correct such issues it is often desirable to check scaling and in turn rescale the model or ask the solvers to employ more aggressive scaling. In terms of solver scaling most LP/MIP solvers do automatic scaling and a number have the option to apply a more aggressive scaling to numerically difficult models, e.
Misbehaving Model – Infeasible

Jul 27, 2017 Tips McCarl Newsletter
I was talking to the GAMS staff and they informed me as to what their most common supportcalls involve. One of them involves fixing bad results. In this and the next couple of newsletters. I will cover how to diagnose problems within models that don’t work right. Also in the next section I will cover an integer programming issue that commonly comes up.

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Authors

Aileen Boehme

Adam Christensen

Bruce McCarl

Christophe Gouel

Clemens Westphal

Evangelos Panos

Fred Fiand

Freddy Proske

George Franco

Justine Broihan

Julien Harou

Leonard Kunz

Logan Randolph

Lutz Westermann

Mohammed Basheer

Marius Bützler

Michael Bussieck

Renke Kuhlmann

Robin Schuchmann

Steve Dirkse

Stefan Mann