TABLE B-3 Total Weighted-System Travel-Distance Reduction with Increase in Supply Points for USDA Dogs Data Set

No. of Facilities

Optimal Supply-Point Locations

Total Weighted-System Travel Distance (miles)

Incremental Percentage Change

0 (base case)



Chico, CA




Chico, CA and Hot Springs, AR




This chapter has described the committee’s efforts to inventory and visualize the “utilization” points of research animals (the locations of institutions that use research animals) and the “supply” points of research animals (the locations of the vendors that breed research animals). Such an effort provides a qualitative sense of the patterns of transportation of research animals. In addition, the chapter presents the results of a quantitative modeling effort to locate additional supply points “optimally” and an assessment of the potential benefit of the additional supply points.

It is important to again emphasize that the locations for additional supply points developed from the quantitative analysis are based solely on the criterion of reducing total weighted travel distance in the research animal transportation system. Furthermore, because a grid system was used to identify candidate location sites and because of the scale of the research animal transportation system, any location within 100 to 200 miles of the locations identified in the analyses would be reasonable.

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