OPER: Information Technology (Topic)最新文献

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gofCopula: Goodness-of-Fit Tests for Copulae gofCopula: copula的拟合优度测试
OPER: Information Technology (Topic) Pub Date : 2021-04-27 DOI: 10.2139/ssrn.3560825
Ostap Okhrin, Simon Trimborn, Martin Waltz
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引用次数: 11
Stability and Innovation in the Use of Forecasting Systems: A Case Study in a Supply-Chain Company 预测系统使用的稳定性和创新性:一个供应链公司的案例研究
OPER: Information Technology (Topic) Pub Date : 2020-01-15 DOI: 10.2139/ssrn.3548701
R. Fildes, P. Goodwin
{"title":"Stability and Innovation in the Use of Forecasting Systems: A Case Study in a Supply-Chain Company","authors":"R. Fildes, P. Goodwin","doi":"10.2139/ssrn.3548701","DOIUrl":"https://doi.org/10.2139/ssrn.3548701","url":null,"abstract":"Computer-based demand forecasting systems have been widely adopted in supply chain companies, but little research has studied how these systems are actually used in the forecasting process. We report the findings of a case study of demand forecasting in a pharmaceutical company over a fifteen-year period. At the start of the study managers believed that they were making extensive use of their forecasting system that was marketed on the basis of the accuracy of its advanced statistical methods. Yet the majority of forecasts were obtained by using the system’s facility for judgmentally overriding the automatic statistical forecasts. Carrying out the judgmental interventions involved considerable management effort as part of an S & OP process, yet these often only served to reduce forecast accuracy. This study uses observations of the forecasting process, interviews with participants and data on the accuracy of forecasts to investigate the reasons underlying the managers’ use of the system at two levels, the individual and the organizational. This evidence is then interpreted using various theories to understand the longevity of the company’s forecasting process, despite potential economic benefits that could be achieved through change. However, 10 years after the original case observations radical transformations of the forecasting system were introduced. The paper concludes by considering the impetus for adopting the new system and processes, and the changes in organizational practices this has led to.","PeriodicalId":412850,"journal":{"name":"OPER: Information Technology (Topic)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121046126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Does the Multisecretary Problem Always Have Bounded Regret? 多秘书问题总是有有限的遗憾吗?
OPER: Information Technology (Topic) Pub Date : 2019-12-17 DOI: 10.2139/ssrn.3497056
R. Bray
{"title":"Does the Multisecretary Problem Always Have Bounded Regret?","authors":"R. Bray","doi":"10.2139/ssrn.3497056","DOIUrl":"https://doi.org/10.2139/ssrn.3497056","url":null,"abstract":"Arlotto and Gurvich (2019) showed that the regret in the multisecretary problem is bounded in the number of job openings, n, and the number of applicants, k, provided that the applicant valuations are drawn from a distribution with finite support. I show that this result does not hold when applicant valuations are drawn from a standard uniform distribution. In this case, the regret is between log(n)/16 - 1/4 and log(n+1)/8, when k = n/2 and n ≥ 16. I establish these bounds with enhanced version of Vera and Banerjee's (2019) compensated coupling technique.","PeriodicalId":412850,"journal":{"name":"OPER: Information Technology (Topic)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122725057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
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