Title : ( Optimality gap of experts' decisions in concrete delivery dispatching )
Authors: Mojtaba Maghrebi , S. Travis Waller , Claude Sammut ,
Full TextAbstract
Concretedeliverydispatchingsuffersfromalackofpracticalsolutionsandtherefore,intheabsenceof automatic solutions,expertsarehiredtohandlethistask.Inaddition,theconcretedeliverydispatching problem canbemodelledmathematicallybutitcanonlysolveuptomediumsizesofthisproblemwithin a practicaltime.Thispaperattemptstoanswerthequestionofhowmuchwecanrelyonexperts\\\'de- cisions. First,theconcretedeliveryproblemispresented.Second,abenchmarkfortheproblemis achieved; twoheuristicmethodsareusedforthoseinstancesthattheirexactsolutionsarenotavailable. Finally,theexperts\\\'decisionsarecomparedwiththeobtainedbenchmarkstoassesstheoptimalitygap of theexperts.A field datasetwhichbelongstoanactiveReadyMixedConcrete(RMC)isusedtoevaluate the proposedidea.Theresultsshowthatexperts\\\'decisionsareneartooptimum,withanaverageac- curacy of90%.However,aftercomparingindividualdecisionsbetweenoptimisationmodelsandthe experts\\\'decisions,wecanconcludethatoptimisationmodelsonlytrytoachievethelowestcost,while the expertprefersamorestabledispatchingsystematslightlyhighercost
Keywords
, Concretedelivery ReadyMixedConcrete Experts\\\' decisions IntegerProgramming MixedIntegerProgramming Robust, GA Sequential, GA
@article{paperid:1074983,
author = {Maghrebi, Mojtaba and S. Travis Waller and Claude Sammut},
title = {Optimality gap of experts' decisions in concrete delivery dispatching},
journal = {Journal of Building Engineering},
year = {2015},
volume = {2},
month = {June},
issn = {2352-7102},
pages = {17--23},
numpages = {6},
keywords = {Concretedelivery
ReadyMixedConcrete
Experts\\\' decisions
IntegerProgramming
MixedIntegerProgramming
Robust-GA
Sequential-GA},
}
%0 Journal Article
%T Optimality gap of experts' decisions in concrete delivery dispatching
%A Maghrebi, Mojtaba
%A S. Travis Waller
%A Claude Sammut
%J Journal of Building Engineering
%@ 2352-7102
%D 2015
