Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparing Single and Multiobjective Evolutionary Approaches to the
  Inventory and Transportation Problem   EVITA, standing for Evolutionary Inventory and Transportation Algorithm, is a
two-level methodology designed to address the Inventory and Transportation
Problem (ITP) in retail chains. The top level uses an evolutionary algorithm to
obtain delivery patterns for each shop on a weekly basis so as to minimise the
inventory costs, while the bottom level solves the Vehicle Routing Problem
(VRP) for every day in order to obtain the minimum transport costs associated
to a particular set of patterns. The aim of this paper is to investigate
whether a multiobjective approach to this problem can yield any advantage over
the previously used single objective approach. The analysis performed allows us
to conclude that this is not the case and that the single objective approach is
in gene- ral preferable for the ITP in the case studied. A further conclusion
is that it is useful to employ a classical algorithm such as Clarke & Wright's
as the seed for other metaheuristics like local search or tabu search in order
to provide good results for the Vehicle Routing Problem.

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The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg