Yet Another Math Programming Consultant

I am a full-time consultant and provide services related to the design, implementation and deployment of mathematical programming, optimization and data-science applications. I also teach courses and workshops. Usually I cannot blog about projects I am doing, but there are many technical notes I'd like to share. Not in the least so I have an easy way to search and find them again myself. You can reach me at erwin@amsterdamoptimization.com.

Tuesday, April 26, 2011

Performance of Python based modeling

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The performance of real-world, large-scale models can be relatively low with Python approaches. I suspect this is because this is essentiall...
3 comments:
Monday, April 18, 2011

Large transportation problem

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I was rerunning a large instance of a test problem with GAMS/MOSEK. As it is a network problem (a transportation model in fact; it models ho...
4 comments:

Live databases

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Recently I was helping out with some AMPL modeling effort. The client used the ODBC table facilities of AMPL to read data directly from an S...
Thursday, April 14, 2011

Modeling vs writing code

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Recently I delivered a prototype model that implements some supply chain functionality and will be integrated into an  Enterprise Resource P...
2 comments:

Large MIP

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I am working on this very large MIP model: MODEL STATISTICS BLOCKS OF EQUATIONS          13     SINGLE EQUA...
5 comments:
Thursday, April 7, 2011

Persistency

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Especially with scheduling models, solutions tend to differ widely from one run to the next. Often this is the case without a significant im...
1 comment:
Thursday, March 10, 2011

Column generation for workforce scheduling

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A client of mine showed some interest in developing some MIP based workforce planning models. Column generation has been used successfully i...
4 comments:
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Erwin Kalvelagen
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