csx ethx ethanol transportation lt brian kendrick lt corey leewright lt mike blackman
TRANSCRIPT
CSX EthX Ethanol Transportation
LT Brian KendrickLT Corey LeewrightLT Mike Blackman
AgendaNetwork Overview
Geographical representation of the network
Potential Operator Problem
Analysis of Network
Network Recommendations
Identifying Our Network
EthX transports ethanol throughout the eastern half of the U.S.
21 total nodes, 7 demand and 2 supply
33 arcs both directed and undirected
Demand on the network is 904 cars per day
Objective – Maximize the flow while minimizing cost
Model Assumptions
Each arc has associated cost * Cij = Cost per day for movement of 1 car along arc
Supply nodes located in areas that have the most production facilities Demand nodes are located at end points of major EthX. * Each arc has a capacity constraint Uij
Capacity on each arc is ≤ capacity of node(i)
Capacities on the intermediary nodes modified to accommodate total demand on network .
* Information provided by CSX website
MAP 2
Network Legend:Green Nodes = Supply NodesYellow Nodes = IntermediariesRed Nodes = Demand Nodes
LegendLegend
Supply Nodes
Intermediary
Demand Nodes
New York Daily News 12/07/2010
26 cars out of a 131 car train derailed near Chicago. 9 of these cars were loaded with Ethanol.
Potential Operator Problem
A threat causes a delay of 12 hours but does not render this arc inoperable.
Penalty added to the overall cost to traverse the affected arc. (∑cij/m)*1.5 = 4232
A terrorist attack is an actual attack which renders the affected arc inoperable.
Zero Threats on Network
Zero Threats on Network
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-452
-452
31
55
65
258
180
96
219
0
0
Three Threats on Network
Three Threats on Network
31
-258
180
96
55
219
65
-452
-452
0
Five Threats on Network
Five Threats on Network
31
258
180
96
55
219
65
-452
-452
0
One Attack on NetworkOne Attack on Network
0
0
0
0
0
00
0
0
0
0
0
-452
-452
65
0
Two Attacks on NetworkTwo Attacks on Network
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-452 21
9
0
00
0
0
0
0
0
0
0
0
0
250
0
Three Attacks on Network
Three Attacks on Network
0 0
0
0
00
0
0
0
0
0
0
0
0 0
0
0
00
0
-452
-452
65
55
219
31
258
180
96
Orl -
PtEv
Orl -
Tam
Jax
- Orl
Atl -
Jax
GA1 - A
tl
GA1 - N
ash
Nas
h - B
ir
Terr
-Nas
h
Chi -
Ter
r -
Lim
a - T
err
Lim
a - G
A1
Tol -
Lim
a
Col -
Lim
a
Tol -
Col
Buf -
Col
Bal -
Col
Alb -
Buf
Alb -
NYC
Bal -
Port
0
1000000
2000000
3000000
4000000Cost vs Number of Threats
No Threats 1 Threat 2 Threats3 Threats 4 Threats 5 ThreatsFrom node a - To node b
Cost in Dollars
0 1 2 3 4 5 6 7 8 9 100
10
20
30
40
50
60
70
80
Cost vs Number of Interdictions
AttacksThreats
Number of Interdictions
Co
st
in M
illio
ns
0 1 2 30
10
20
30
40
50
60
70
80
90
100
Percent Demand Met
Number of Attacks
Perc
en
t D
em
an
d M
et
MAP 2
Recommendations-Eliminate or increase capacity at choke points-Increase the number of Supply nodes- Incorporate short lines & regional lines-Alternative means of transportation
