Hybrid Genetic Algorithm for the Location - Routing Problem with Emergency Referral
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Abstract
In this research, the location routing problem with emergency referral (LRPER) was
defi ned to solve for (i) the number of local blood banks (LBBs) and their locations;
(ii) the assignment of each hospital to each LBB; (iii) the routing from LBBs to hospitals
for blood delivery. The mathematical model for LRPER was proposed to solve for the
number of LBBs and their locations in such a way that the total cost is minimized and the
emergency blood referrals are satisfi ed. LRPER, which is a special case of Location - Routing
Problem, is NP-hard problem. Hybrid Genetic Algorithm (HGA) was developed to solve
LRPER. A data set of 93 LBBs in the lower north-eastern provinces of Thailand was used
as a case study in this research. The results shown that HGA is an appropriate method
to solve LRPER giving the number of locations and routes that yield the lowest cost.
Article Details
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