An application of Special Ordered Sets to a periodic milk collection problem

Claassen, G.D.H.; Hendriks, Théo

doi:10.1016/j.ejor.2006.03.042

Cited by 52 publications

(35 citation statements)

References 11 publications

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“…A truck carrying a trailer services a customer and a trailer (emptied or laden) is left for two days at a customer's location and later picked by the same or any other vehicle. Claassen & Hendriks (2007) highlighted the periodic goat's milk collection problem for the Dutch dairy industry. It envisions the importance of possible rhythms for processing of goat's milk along with a constricted schedule of cow's milk.…”

Section: Literature Reviewmentioning

confidence: 99%

A Hybrid Approach for Milk Collection Using Trucks and Trailers

Pasha¹,

Hoff²,

Løkketangen³

2014

AMS

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Section: Literature Reviewmentioning

confidence: 99%

A Hybrid Approach for Milk Collection Using Trucks and Trailers

Pasha¹,

Hoff²,

Løkketangen³

2014

AMS

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“…The pricing problem only allows such activities to be part of paths on appropriate days. Let π (2) i ∈ R be the dual of constraints (2), π…”

Section: Exact Solution Algorithmmentioning

confidence: 99%

“…This corresponds to a modified VRPTW and is denoted the daily University of Southern Denmark, DK-5230 Odense M, e-mail: gamst@man.dtu.dk and thomassejr@gmail.com 1 planning problem [1,4,5]. (2) Otherwise a Periodic VRPTW is solved, i.e., plans are made for several days, but regularity constraints are ignored [2,6,7].…”

Section: Introductionmentioning

confidence: 99%

A branch-and-price algorithm for the long-term home care scheduling problem

Gamst

Jensen

2012

Operations Research Proceedings

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In several countries, home care is provided for certain citizens living at home. The long-term home care scheduling problem is to generate work plans such that a high quality of service is maintained, the work hours of the employees are respected, and the overall cost is kept as low as possible. We propose a branchand-price algorithm for the long-term home care scheduling problem. The pricing problem generates a one-day plan for an employee, and the master problem merges the plans with respect to regularity constraints. The method is capable of generating plans with up to 44 visits during one week.

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“…Moreover, reducing the energy consumption and the related emissions of carbon dioxide in the milk production system represents an important issue to be analysed further, likewise mobility plans that affect strategies and actions [5,6]. Several studies on milk collection have been carried out [7][8][9][10][11][12], while no in-depth studies have yet been made of the problems that are involved in collecting and transporting sheep milk to the cheese factories. As a result, there is a lack of scientific data and little information is available to the cheese factory managers to help them to rationalise the overall transportation system.…”

Section: Introductionmentioning

confidence: 99%

Modelling the Collection and Delivery of Sheep Milk: A Tool to Optimise the Logistics Costs of Cheese Factories

2018

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Abstract:The milk transformation process, in the last thirty years, moved from on-farm to centralised cheese factories, affecting the management of transport logistics. In Sardinia, the presence of about 12,000 dairy sheep farms, located in rural areas with poor condition of road network, makes collecting milk a significant impact on profit, affecting the costs of milk transportation. Moreover, dairy sheep farming is characterized by seasonal production, this means that the amount of milk that is produced by each farm differs significantly over the year. The objective of this work was to develop a decision support tool that, while optimising milk collection routes, reduced the costs of milk transport, thus improving the density of collection. The tool developed ad hoc in this study used GPS map location and milk volumes of farms to calculate the cost per litre of milk for the regular routing, and to recalculate the same cost for the optimised collecting route. Results showed that this tool improved the efficiency of milk collection, reducing the number of routes and the driving distances. Furthermore, optimising the density of collection, the new routes improved the environmental impact and the transportation costs that are associated with logistic and traceability of raw sheep milk.

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An application of Special Ordered Sets to a periodic milk collection problem

Cited by 52 publications

References 11 publications

A Hybrid Approach for Milk Collection Using Trucks and Trailers

A Hybrid Approach for Milk Collection Using Trucks and Trailers

A branch-and-price algorithm for the long-term home care scheduling problem

Modelling the Collection and Delivery of Sheep Milk: A Tool to Optimise the Logistics Costs of Cheese Factories

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