Stochastic vehicle routing with recourse
Publication: Research - peer-review › Article in proceedings – Annual report year: 2012
We study the classic Vehicle Routing Problem in the setting of stochastic optimization with recourse. StochVRP is a two-stage problem, where demand is satisfied using two routes: fixed and recourse. The fixed route is computed using only a demand distribution. Then after observing the demand instantiations, a recourse route is computed - but costs here become more expensive by a factor λ. We present an O(log2n ·log(nλ))-approximation algorithm for this stochastic routing problem, under arbitrary distributions. The main idea in this result is relating StochVRP to a special case of submodular orienteering, called knapsack rank-function orienteering. We also give a better approximation ratio for knapsack rank-function orienteering than what follows from prior work. Finally, we provide a Unique Games Conjecture based ω(1) hardness of approximation for StochVRP, even on star-like metrics on which our algorithm achieves a logarithmic approximation.
| Original language | English |
|---|---|
| Title | Automata, Languages, and Programming : 39th International Colloquium, ICALP 2012 |
| Editors | Artur Czumaj, Kurt Mehlhorn , Andrew Pitts, Roger Wattenhofer |
| Publisher | Springer |
| Publication date | 2012 |
| Pages | 411-423 |
| ISBN (print) | 978-3-642-31593-0 |
| DOIs | |
| State | Published |
Conference
| Conference | Automata, Languages, and Programming. 39th International Colloquium, ICALP 2012 |
|---|---|
| City | Warwick |
| Period | 01-01-12 → … |
| Name | Lecture Notes in Computer Science |
|---|---|
| Volume | 7391 |
| ISSN (Print) | 0302-9743 |
| Citations | Web of Science® Times Cited: No match on DOI |
|---|
Loading map data...
ID: 10197667