{"title":"Performance Evaluation of Full Turnover-based Policy in the Flow-rack AS/RS","authors":"Meng Zhao, Zhuxi Chen","doi":"10.1145/3424978.3425143","DOIUrl":null,"url":null,"abstract":"In a flow-rack AS/RS, unit-loads to be stored slide from the storage face to the retrieval face driven by the gravity, which lets stored unit-loads follow the first-in-first-out rule in each bin. Consequently, a requested unit-load might be blocked by blocking unit-loads stored in front of it. Blocking unit-loads require extra cost to be removed and restored before retrieving requested ones. Full turnover-based (FTB) storage policy can be employed in flow-rack AS/RS, in which each bin contains the same type of unit-loads to ensure the avoidance of blocking unit-loads when systems request a unit-load. In this paper, the performance of FTB policy is evaluated for the flow-rack AS/RS, which is compared to the in-deep storage policy. Because in-deep storage policy takes a lot of time to deal with blocking unit-loads, we can see whether FTB policy without blocking unit-loads performs better than in-deep storage policy with the same external conditions.","PeriodicalId":178822,"journal":{"name":"Proceedings of the 4th International Conference on Computer Science and Application Engineering","volume":"87 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the 4th International Conference on Computer Science and Application Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1145/3424978.3425143","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In a flow-rack AS/RS, unit-loads to be stored slide from the storage face to the retrieval face driven by the gravity, which lets stored unit-loads follow the first-in-first-out rule in each bin. Consequently, a requested unit-load might be blocked by blocking unit-loads stored in front of it. Blocking unit-loads require extra cost to be removed and restored before retrieving requested ones. Full turnover-based (FTB) storage policy can be employed in flow-rack AS/RS, in which each bin contains the same type of unit-loads to ensure the avoidance of blocking unit-loads when systems request a unit-load. In this paper, the performance of FTB policy is evaluated for the flow-rack AS/RS, which is compared to the in-deep storage policy. Because in-deep storage policy takes a lot of time to deal with blocking unit-loads, we can see whether FTB policy without blocking unit-loads performs better than in-deep storage policy with the same external conditions.