(r1) The Winstone Aggregates Problem < OpsRes

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   * winstones_1.jpg: <br />
     <img src="%ATTACHURLPATH%/winstones_1.jpg" alt="winstones_1.jpg" width='610' height='391' />

   * winstones_2.jpg: <br />
     <img src="%ATTACHURLPATH%/winstones_2.jpg" alt="winstones_2.jpg" width='615' height='464' />

CaseStudyForm
Title	The Winstone Aggregates Problem
DateSubmitted	10 Mar 2008
CaseStudyType	DIYCaseStudy
OperationsResearchTopics	LinearProgramming, BlendingModels
ApplicationAreas
ProblemDescription	Winstone Aggregates NZ is New Zealand's largest aggregate company. They operate 12 hard rock quarries throughout New Zealand along with Sand Plants, Gravel and Shingle Plants and a Scoria Pit. The aggregates produced by Winstones are used in the construction of roads and buildings. In 1997 Winstone Aggregates approached the Department of Engineering Science (University of Auckland) to help with strategic planning for the closure of the Lunn Ave Quarry in Mt Wellington. The original model devised by Department of Engineering Science researchers was written in GAMS (General Algebraic Modeling language), and solved using MINOS. Winstones take Sand, Scoria, Basalt and Greywacke from their quarries and mix these to produce several different types of aggregate: Coarse Fines LowBase HighBase Sand Scalpings Scoria Sealchips The amount of each raw material available is limited as the Resource Consent Act controls the extraction of the raw materials from the quarries.
ProblemFormulation	The formulation...
ComputationalModel	The computational model...
Results	The results...
Conclusions	In conclusion...
ExtraForExperts
StudentTasks

Topic revision: r1 - 2008-03-09 - MichaelOSullivan

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