Honors College Thesis
 

Interaction of Design Factors in the Truckload Relay Network Design with Mixed Fleet Dispatching Problem

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https://ir.library.oregonstate.edu/concern/honors_college_theses/r207tt93z

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  • Truckload carriers operating under a Point-To-Point (PtP) dispatching method seek to minimize miles driven with empty loads. This results in driving tours keeping drivers away from their homes for weeks at a time causing high turnover rates industry wide. One proposed solution combines Relay Network dispatching with existing PtP. This design problem is called Truckload Relay Network Design with Mixed-Fleet Dispatching (TLRND-MD). Vergara and Root (2013) attained high quality solutions for large-size network instances of TLRND-MD using an integer programming formulation and a heuristic solution approach. Their model considered several design factors and their experiments looked at the effect of some design factors on model performance and solution quality. However, their experiments ignored the interactions between design factors. This thesis expands on this research via a full factorial experiment, discovering significant interactions between equipment balance restrictions, minimum volume required to open Relay Points (RPs), maximum proportion of PtP loads allowed, and fixed RP installation costs. The ultimate hope of this research is that greater understanding of these interactions will motivate carriers to pursue the implementation of TLRND-MD systems in practice and improve driver retention. This thesis ends with a discussion of conclusions and ideas for future research.
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