arXiv subjects

Constantine Goulimis

Publications and source records attributed to Constantine Goulimis.

3 recordsLinked to original sources

arXiv2020

Reel Stock Analysis for an Integrated Paper Packaging Company

The production of corrugated paper boxes accounts for roughly one third of the world's total paper production and, as a result of both COVID-19 and the rise of e-commerce, is a growing market. We provide a fresh approach to determining near-optimal stock policies for integrated paper companies. The new approach shows that existing policies can be improved by a significant margin. In a case study we saw a reduction in total waste by 9%, with a simultaneous decrease in logistics costs.

q-fin.GN↗

arXiv2020

Counterexamples in the CSP

We present a collection of examples in various aspects of the one-dimensional cutting stock problem ('1D-CSP'). Based on our 37+ year experience in this area, we discuss some modelling pitfalls and counterexamples.

math.OC↗

arXiv2020

Can ML predict the solution value for a difficult combinatorial problem?

We look at whether machine learning can predict the final objective function value of a difficult combinatorial optimisation problem from the input. Our context is the pattern reduction problem, one industrially important but difficult aspect of the cutting stock problem. Machine learning appears to have higher prediction accuracy than a naïve model, reducing mean absolute percentage error (MAPE) from 12.0% to 8.7%.

cs.AI↗