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5 accuracy of the ca expression terminal location

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Unformatted text preview: dd 3.5 Accuracy of the CA Expression Terminal Location Problem Source: Daganzo (2005), Logistics System Analysis, Springer Terminal Location Problem • Exact Procedure – Start at and draw a vertical step that is bisected by – Draw a horizontal line that is bisected by – Continue until – Try the different values of cost is minimized until the total Lower Bound • Constant Demand – =1, =1, – CA Solution • ∗ =1 ′ dd – Exact Solution • 2/2 • • ′ 2 – Lower bound of exact solution • /4 • Gap increases as increases s s /2 D’/2 Variable Demand • CA method – – – – – – – =1700 =500 ′ 1, ′ 5 200 =160,000 =1 ∗ ≅ ∗ – ≅ 348,328 – Interval between terminals • ≅2 =800 ( ′ 1), 357 ( ′ – Total # of terminals= /800+( )/357=1.09 5) - Source: Daganzo (2005), Logistics System Analysis, Springer Variable Demand • Exact Solution Source: Daganzo (2005), Logistics System Analysis, Springer – n=1 – Total Cost = =320,500 - 8% lower than CA 72250 42250 20000 26000 =200 330 Variable Demand • Exact Solution Source: Daganzo (2005), Logistics System...
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