TY - JOUR
T1 - Improving maritime inventory routing
T2 - application to a Brazilian petroleum case
AU - Diz, Gustavo Souto dos Santos
AU - Oliveira, Fabricio
AU - Hamacher, Silvio
PY - 2017/1/2
Y1 - 2017/1/2
N2 - The crude oil offloading and supply problem (COSP) is a type of operation maritime inventory routing (MIR) problem encountered by petroleum companies. In COSP, the company not only is responsible for the ship scheduling to carry the crude oil from production sites to discharge ports but also must maintain inventory levels at both ports (production and consumption) between safety operational bounds to avoid disruptions in its crude oil production and/or refining processes. We show how to improve significantly the decision-making process in a Brazilian petroleum company using a mixed-integer linear programming (MILP) model to represent COSP. Comparison tests with a current ship-scheduling method adopted in the company indicated that the use of the MILP model increased the transportation efficiency and reduced costs by 20% on average. In addition to the quantitative gains, the use of a MILP model to solve COSP has succeeded when encountering real-life events, such as variation in production or consumption rates, berth unavailability, and changes in the storage capacities at ports.
AB - The crude oil offloading and supply problem (COSP) is a type of operation maritime inventory routing (MIR) problem encountered by petroleum companies. In COSP, the company not only is responsible for the ship scheduling to carry the crude oil from production sites to discharge ports but also must maintain inventory levels at both ports (production and consumption) between safety operational bounds to avoid disruptions in its crude oil production and/or refining processes. We show how to improve significantly the decision-making process in a Brazilian petroleum company using a mixed-integer linear programming (MILP) model to represent COSP. Comparison tests with a current ship-scheduling method adopted in the company indicated that the use of the MILP model increased the transportation efficiency and reduced costs by 20% on average. In addition to the quantitative gains, the use of a MILP model to solve COSP has succeeded when encountering real-life events, such as variation in production or consumption rates, berth unavailability, and changes in the storage capacities at ports.
KW - fixed charge network flow formulation
KW - Maritime inventory routing
KW - mixed-integer linear programming
KW - ship scheduling
UR - http://www.scopus.com/inward/record.url?scp=84983356919&partnerID=8YFLogxK
U2 - 10.1080/03088839.2016.1216622
DO - 10.1080/03088839.2016.1216622
M3 - Article
AN - SCOPUS:84983356919
VL - 44
SP - 42
EP - 61
JO - Maritime Policy and Management
JF - Maritime Policy and Management
SN - 0308-8839
IS - 1
ER -