Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/14932
Title: Heuristic rescheduling for managing abnormal refinery supply chain events
Authors: ARIEF ADHITYA
Keywords: Risk Management, Optimization, Reactive Scheduling, Uncertainty, Crude Oil, Disruption Management
Issue Date: 25-Aug-2005
Source: ARIEF ADHITYA (2005-08-25). Heuristic rescheduling for managing abnormal refinery supply chain events. ScholarBank@NUS Repository.
Abstract: Todaya??s many uncertainties require that, for sustainable operations, supply chains be resilient and nimble while reacting to disruptions. We look at a refinery supply chain where disruptions such as crude arrival delay could make the current schedule infeasible; so rescheduling of operations is important. Refinery scheduling for a real world industrial size problem typically requires a significantly large amount of time to generate an optimal schedule. We present a strategy for recovering from disruptions by heuristic rescheduling. The main ideas of our method are breaking down the schedule into operation blocks and preserving the blocks in the schedule as far as possible. The major advantages of our method are greatly reduced computation time, minimum change in handling disruptions as compared to total rescheduling, and multiple proposed schedules. A second method which is model-based is proposed to overcome the shortcomings of the first heuristic-based method. The model-based method is more general, flexible, and complete than the heuristic method. The capabilities of the proposed methods are illustrated with several case studies.
URI: http://scholarbank.nus.edu.sg/handle/10635/14932
Appears in Collections:Master's Theses (Open)

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a3_Title Page.pdf7.13 kBAdobe PDF

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a4_Dedication Page.pdf6.45 kBAdobe PDF

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b1_page i_Acknowledgements.pdf7.91 kBAdobe PDF

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b2_page ii-iv_Table of Contents.pdf11.52 kBAdobe PDF

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b3_page v-vi_Summary.pdf12.25 kBAdobe PDF

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b4_page vii_List of Figures.pdf7.61 kBAdobe PDF

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b5_page viii-ix_List of Tables.pdf11.16 kBAdobe PDF

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c1_page 1-4_Chapter 1_Introduction.pdf17.03 kBAdobe PDF

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c2_page 5-20_Chapter 2_Literature Review.pdf152.84 kBAdobe PDF

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c3_page 21-27_Chapter 3_Problem Description.pdf149 kBAdobe PDF

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c4_page 28-58_Chapter 4_Heuristic-based Rescheduling Strategy.pdf512.6 kBAdobe PDF

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c5_page 59-102_Chapter 5_Model-based Rescheduling Strategy.pdf425.71 kBAdobe PDF

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c6_page 103-105_Chapter 6_Conclusions and Recommendations.pdf14.59 kBAdobe PDF

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d1_page 106-110_References.pdf19.34 kBAdobe PDF

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