Abstract
This work presents an exact Logic Based Benders' decomposition for the Concrete Delivery Problem (CDP). The CDP is a complex, real world optimization problem involving the allocation and distribution of concrete to construction sites. The key scheduling issue for the CDP is the need for successive deliveries to a site to be sufficiently close in time. We decompose the CDP into a master problem and a subproblem. Based on a number of problem characteristics such as the availability of vehicles, geographical orientation of the customers and production centers, as well as the customers' demand for concrete, the master problem allocates concrete to customers. Next, the subproblem attempts to construct a feasible schedule, meeting all the routing and scheduling constraints. Infeasibilities in the schedule are communicated back to the master problem via a number of combinatorial inequalities (Benders' cuts). The master problem is solved through a Mixed Integer Programming approach, whereas the subproblem is solved via a Constraint Programming model and a dedicated scheduling heuristic. Experiments are conducted on a large number of problem instances, and compared against other exact methods presented in related literature. This algorithm is capable of solving a number of previously unsolved benchmark instances to optimality and can improve the bounds for many other instances.
| Original language | English |
|---|---|
| Title of host publication | Integration of AI and OR Techniques in Constraint Programming |
| Subtitle of host publication | 11th International Conference, CPAIOR 2014, Cork, Ireland, May 19-23, 2014. Proceedings |
| Editors | H. Simonis |
| Place of Publication | Dordrecht |
| Publisher | Springer |
| Pages | 176-192 |
| Number of pages | 17 |
| ISBN (Electronic) | 978-3-319-07046-9 |
| ISBN (Print) | 978-3-319-07045-2 |
| DOIs | |
| Publication status | Published - 2014 |
| Externally published | Yes |
| Event | 11th International Conference on the Integration of Artificial Intelligence and Operations ResearchTechniques in Constraint Programming, (CPAIOR 2014) - Cork, Ireland Duration: 19 May 2014 → 23 May 2014 Conference number: 11 |
Publication series
| Name | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
|---|---|
| Volume | 8451 LNCS |
| ISSN (Print) | 0302-9743 |
| ISSN (Electronic) | 1611-3349 |
Conference
| Conference | 11th International Conference on the Integration of Artificial Intelligence and Operations ResearchTechniques in Constraint Programming, (CPAIOR 2014) |
|---|---|
| Abbreviated title | CPAIOR 2014 |
| Country/Territory | Ireland |
| City | Cork |
| Period | 19/05/14 → 23/05/14 |
Keywords
- Integer and Constraint Programming
- Logic Based Benders' Decomposition
- Scheduling
- Vehicle Routing
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