Three essays in operations management.
详细信息
- 作者：Zhu ; Yunxia.
- 学历：Doctor
- 年：2012
- 导师：Dawande,Milind,eadvisorSriskandarajah,Chelliah,eadvisorJanakiraman,Ganeshecommittee memberMookerjee,Vijay S.ecommittee memberNiu,Shun-Chenecommittee member
- 毕业院校：The University of Texas
- Department：Management Science.
- ISBN：9781267569745
- CBH：3523760
- Country：USA
- 语种：English
- FileSize：3969123
- Pages：216
文摘
This dissertation addresses three important problems in operations management. The aim of the first problem is to highlight&mdash；and demonstrate via specific examples&mdash；the need for algorithmic results for some fundamental set-based notions on which search in social networks is expected to be prevalent. To this end,we argue that the concepts of ＜italic＞an influential set＜/italic＞ and ＜italic＞a central set＜/italic＞ that highlight,respectively,the specific role and specific location of a set are likely to be useful in practice. We formulate two specific search problems: the Elite Group Problem EGP) and the Portal Problem PP),that represent these two concepts and provide a variety of algorithmic results. In the second paper,we introduce two new multi-period models&mdash；designed specifically to capture the operations of a medium-size Depository Institution DI)&mdash；that emerge from the DIs objective to minimize the total cost incurred in managing the inventory of cash over a finite planning horizon. The Basic Model BM) captures the DIs mode of operations if it chooses not to locally reuse cash and,instead,incur the cross-shipping penalty. The Reuse Model RM) represents the DIs actions when it locally recirculates cash. We show that the ＜italic＞Value of Local Reuse＜/italic＞ for a DI,measured as the percentage cost saving between the optimal solutions of BM and RM,is substantial. The third problem investigates the concept of ＜italic＞Industrial Symbiosis ＜/italic＞,a resource-sharing strategy among co-located firms to engage traditionally separate industries in a collective approach that involves physical exchanges of materials,water,energy and by-products. Inspired by a real-world example of a paper-sugar symbiotic complex,we study the impact on a firms operational decisions from implementing an industrial symbiotic system. Our focus is on understanding how the introduction of competition and nature of competition will affect the firms "willingness" to implement the symbiotic system.