Analyzing Underway Replenishments Through Spatial Mapping
NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OPERATIONS RESEARCH
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The United States Navys Military Sealift Command MSC employs its Combat Logistics Force CLF to supply the combatant fleet through replenishments at sea RAS. These RAS events need to be conducted where the combatant fleet operates. The Replenishment at-Sea Planner RASP is an operational planning tool that supports the Navys mission of conserving fuel as it seeks optimal schedules for CLF ships to service customers operating worldwide. RASP relies on data input of customer positions to schedule replenishments. Planners currently forecast expected customer positions at the geometric center of an Operational Area Box OP Box because there is a deficiency of data to support more accurate location forecasts. We introduce logistics planners who use RASP to a more accurate forecast of future RAS locations. We begin by collecting historical replenishment data and giving a visual representation of the data through geographical spatial heat mapping. From the historical RAS locations, we calculate the most probable location for a future RAS by determining the centroid. The centroid is determined by taking the weighted averages of each historical RAS location. We create a fabricated scenario of the U.S. Pacific Coast that includes OP Boxes for customer ships to operate and ports for logistical sources to CLF ships. We utilize RASP to run our scenario. We conduct separate RASP runs to produce the optimal schedules for replenishments from geometric center and calculated centroid locations within the OP Boxes, then compare the results to determine the impact of each method on CLF assets, fuel costs, and time. The results show that the centroid location offers significant improvements in customer readiness and total CLF underway fuel usage planning.
- Cartography and Aerial Photography
- Operations Research
- Marine Engineering
- Logistics, Military Facilities and Supplies