A multi-period vehicle routing problem in a reverse logistics system with recovery options

Date of Publication

2008

Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Industrial Engineering

College

Gokongwei College of Engineering

Department/Unit

Industrial and Systems Engineering

Thesis Adviser

Dennis E. Cruz

Defense Panel Member

Bryan O. Gobaco

Abstract/Summary

Reverse Logistics with Recovery Options studies have grown in recent times as the need for the preservation of our environment becomes very important nowadays and corporations must address this situation while maintaining profitable business operations. In addition to reverse logistics with recovery options, Vehicle Routing with time windows was also considered in this study due to the high amount of cost it makes up in distribution systems such as supply chains and logistics operations. Vehicle Routing can contribute to up to 30% of the total system cost of distribution systems.

This study was aimed at integrating vehicle routing to a reverse logistics system with recovery options which incorporates vehicle time window and carrying costs that would enable a company to efficiently handle returned product flows and evaluate whether the use of these products would enable the company to minimize their total system cost in satisfying the demand. The study deals with a three-echelon network consisting of collection centers, warehouses, and factory or repair center for a single product considering only the reverse logistics activities. A deterministic model was created and translated to the General Algebraic Modeling Systems (GAMS) language and then validation was done to verify the model's behavior. Design of Experiments (DOE) was used to identify which factors significantly affect the system response then these factors were used in the Response Surface Methodology (RSM) to analyze the behavior of the relationships of the variables in the system.

Based on the results of the sensitivity analysis or in the use of RSM, it was found that the modeler would be more capable of minimizing the total system cost if vehicle routing was integrated in a reverse logistics system with recovery options.

Abstract Format

html

Language

English

Format

Print

Accession Number

TU14962

Shelf Location

Archives, The Learning Commons, 12F, Henry Sy Sr. Hall

Physical Description

viii, 169 leaves : ill. (some col.) ; 28 cm.

Keywords

Railroad travel; Business logistics; Traffic engineering; Transportation engineering

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