Operations and Supply Chain Management Commons^™

Identification And Implementation Of Patterns Towards A Model Of Environmental Sustainability, S. Jimmy Gandhi, Santiago Perez, Danial Rushton, Robert Cloutier, Ipek Bozkurt, C. Ariel Pinto

Engineering Management & Systems Engineering Faculty Publications

Much like the Quality Revolution did in the 1980's, corporate sustainability has the potential to drive significant changes in the processes and structure of various organizations in the coming decade. With a rapidly growing global population and an ever increasing global demand for resources (Population-Resource-Center, 2012). Sustainability has emerged as one of the primary challenges that organizations will have to deal with in the 21st century. An increasing realization among business executives that profitability by itself is not enough as a measure of success is also driving the increased adoption of sustainable practices in the corporate world (Lowitt and Grimsley, …

Order-Picking By Cellular Bucket Brigades: A Case Study, Yun Fong Lim

Research Collection Lee Kong Chian School Of Business

Assigning products to and retrieving them from proper storage locations are crucial in minimizing the operating cost of a unit-load warehouse. The problem becomes intractable when the warehouse faces variable supply and uncertain demand in a multi-period setting. We assume a factor-based demand model in which demand for each product in each period is affinely dependent on some uncertain factors. The distributions of these factors are only partially characterized. We introduce a robust optimization model that minimizes the worst-case expected total travel in the warehouse with distributional ambiguity of demand. Under a linear decision rule, we obtain a storage and …

Simulating School Closure Policies For Cost Effective Pandemic Decision Making, Ozgur M. Araz, Paul Damien, David A. Paltiel, Sean Burke, Bryce Van De Geijn, Alison Galvani, Lauren Ancel Meyers

Department of Supply Chain Management and Analytics: Faculty Publications

Background: Around the globe, school closures were used sporadically to mitigate the 2009 H1N1 influenza pandemic. However, such closures can detrimentally impact economic and social life.

Methods: Here, we couple a decision analytic approach with a mathematical model of influenza transmission to estimate the impact of school closures in terms of epidemiological and cost effectiveness. Our method assumes that the transmissibility and the severity of the disease are uncertain, and evaluates several closure and reopening strategies that cover a range of thresholds in school-aged prevalence (SAP) and closure durations.

Results: Assuming a willingness to pay per quality adjusted life-year (QALY) …

Commercial Construction Supply Chain Management Issues Involving Traveling Contractors, Fred Akers

Masters Theses

Supply chain management (SCM) is an important aspect of running any business. To stay competitive in today's marketplace a supply chain management system must be in place to achieve success in this volatile global environment (Fewings, 2005).

This research differentiates the issues between executing a construction project close to home compared to away from home. Being away from home, there typically is no supplier relationship established. Furthermore, the research intends to document certain issues of the commercial construction industry that develop during the execution of a project. This will be based on the comparison of having or not having an …

Game-Theoretic Analysis Of The Quality Assurance Problem In A Two-Echelon Supply Chain With A Retailer As The Quality Gatekeeper, Zaichen Li

Lingnan Theses

We consider a two-level supply chain involving a manufacturer and a retailer who serves as the quality gatekeeper. The manufacturer determines a wholesale price and a defective rate and announces his decisions to the retailer, who then makes her decisions on the retail price and identification rate that means the percent- age of the defects identified by the retailer and reflects the retailer’s gatekeeping effort on her quality assurance. We accordingly develop a leader-follower game and solve it to find Stackelberg equilibrium for the manufacturer and the retailer. In order to examine whether or not the supply chain benefits from …

أهمية استخدام نظام محاسبة التكاليف على أساس الأنشطة ( Abc ) في الشركات الصناعية العراقية: دراسة تطبيقية في الشركة العامة للزيوت النباتية (مصنع المأمون), قاسم محمد عبدالله

Muthanna Journal of Administrative and Economics Sciences

هدفت الدراسة الى التعرف على مدى مقومات تطبيق نظام ABC في بيئة الشركات الصناعية العراقية / شركة الزيوت النباتية (مصنع المأمون) لغرض تطبيق نموذج جديد لحساب تكاليف الشركات كبديل عن الانظمة التقليدية المعمول بها حالياً وان هذه الطريقة تسمى حساب ” التكاليف المبنية على الانشطة ” ولقد اثبتت الطريقة الحديثة جدوى عالية وقدرة فائقة على وصف الواقع بطريقة ادق من الطرق التقليدية مما يسهل من الاجراءات المناسبة لتقليل التكلفة والتحكم بها . أظهرت نتائج الدراسة ان استخدام نظام ABC سيساعد في استبعاد الانشطة غير المجدية التي لا تضيف اي قيمة للمنتج النهائي وعدم ضمان دقة احتساب التكاليف . ان اهم …

مدى ملائمة النظام المحاسبي الفندقي لمتطلبات نظام التحاسب الضريبي (دراسة تطبيقي فندق الديار السياحي), ناظم حسن عبد السيد

Muthanna Journal of Administrative and Economics Sciences

يشهد قطاع السياحة بنشاطاته المختلفة تطورا وأهتمامآ ملحوظا، وتعد الصناعة الفندقية من أهم الفعاليات السياحية عالميا وهذا ناتج من مساهمتها في اقتصاديات الدول من حيث المساهمة في الدخل المحلي وتحصيل العملات الأجنبية.يهدف البحث إلى عرض نظام محاسبي فندقي يتلاءم مع نظام التحاسب الضريبي فضلا عن التعريف بمفهوم المحاسبة الفندقية والعلاقة بين المحاسبة والضريبة ، ويختتم الباحث عمله بمجموعة من الاستنتاجات والتوصيات .

دور التقارير المالية المنشورة للشركات المساهمة في تلبية احتياجات المستخدمين من المعلومات دراسة استطلاعية على عينة من الوسطاء والمستثمرين في سوق العراق للأوراق المالية, فالح عبد الحسن داود

Muthanna Journal of Administrative and Economics Sciences

هدفت هذه الدراسة إلى بيان الدور الذي يمكن أن تلعبه معلومات التقارير المالية للشركات المدرجة في سوق العراق للأوراق المالية في قرارات المستخدمين المتعلقة ببيع وشراء أسهم هذه الشركات ، وباعتماد أسلوب الاستبيان الذي تم توزيعه على عينة مكونة من ( 42 ) فردا من الوسطاء الماليين والمستثمرين المتعاملين في هذه السوق ، فقد كانت من أهم نتائج الدراسة ما يلي :-إن هؤلاء المستخدمين لا يحصلون على التقارير المالية للشركات بسهولة ويسر وإنها لا تتوفر لهم في الوقت المناسب وحاجتهم إليها .-يعتمد هؤلاء المستخدمين على هذه التقارير في قراراتهم الاستثمارية حيث يفهمون المعلومات المحاسبية ويستخدمونها بالشكل الملائم والصحيح .-لا يكتفي …

التحديات التي تواجه مهنة المحاسبة والتدقيق في إطار عناصر البيئة التقنية الحديثة وآثرها على جودة وموثوقية المعلومات المحاسبية, ناظم شعلان جبار

Muthanna Journal of Administrative and Economics Sciences

أصبح العصر الحالي هو عصر المعلومات وأنظمتها والبحث عن أفضل استخداماتها بأقل تكلفة ووقت, ولقد ازدادت في السنوات الأخيرة قدرة نظام المعلومات المحاسبية على الوفاء بالاحتياجات المطلوبة من المعلومات وذلك نتيجة لتحسن وسائل القياس وتشغيل وتحليل المعلومات باستخدام أنظمة الكمبيوتر المتطورة، إذ اتجهت معظم الشركات إلى تصميم أنظمة معلومات محاسبية بمواصفات محددة، وخاصة في ظل تكنولوجيا المعلومات، وذلك بهدف السيطرة على الكم الهائل من المعلومات الضرورية في تلك الشركات وضمان موثوقية كبيرة لها. ويعتبر استخدام تكنولوجيا المعلومات في تدقيق الحسابات من القضايا المعاصرة التي انبثقت عن إدراك مدققي الحسابات لأهمية مثل هذا الاستخدام لما يوفره من مساعدة في اختيار عينة …

Dock Assignment And Truck Scheduling Problems At Cross-Docking Terminals, Ching-Jung Ting, Amanda G. Rodríguez López

12th IMHRC Proceedings (Gardanne, France – 2012)

In this paper, we consider the integration of dock assignment and truck scheduling problem at cross-docking terminals. The problem is first formulated as a 0-1 integer programming model. Since both dock assignment and truck scheduling problems are NP-hard, its integration is more difficult to solve. Thus we propose reduced variable neighborhood search (RVNS) algorithms to solve the problem. Computational experiments are carried out on four set of instances. The results show that RVNS is capable of finding good solutions in a much shorter computation time when it is compared with optimization solver Gurobi’s solutions.

Multi-Party Multi-Period Supply Chain Coordination, Thin Yin Leong, Michelle Lee Fong Cheong

Research Collection School Of Computing and Information Systems

We apply combinatorial auction as a coordination mechanism to smooth demands placed on suppliers' limited production capacities, allowing several manufacturers to share common suppliers effectively. Products are bidders bidding for parts from suppliers, consuming their capacities in different time periods. The fourth party logistic (4PL) provider acts as the auctioneer to coordinate bids and perform price iterations. We leverage on the strong links between the Lagrangian relaxation method and combinatorial auction, where the Lagrange multipliers serve as the supply capacity reserve prices, to balance the demand and supply of capacities. To prevent cyclic behaviour and to increase convergence speed, we …

Technical Note: Cellular Bucket Brigades, Yun Fong Lim

Research Collection Lee Kong Chian School Of Business

Workers in a bucket brigade production system perform unproductive travel when they walk to get more work from their colleagues. We introduce a new design of bucket brigades to reduce unproductive travel. Under the new design, each worker works on one side of an aisle when he proceeds in one direction and works on the other side when he proceeds in the reverse direction. We propose simple rules for workers to share work under the new design and find a sufficient condition for the system to self-balance. Numerical examples suggest that the improvement in throughput by the new design can …

Stochastic Capacity Investment And Flexible Vs. Dedicated Technology Choice In Imperfect Capital Markets, Onur Boyabatli, L. Bertil Toktay

Research Collection Lee Kong Chian School Of Business

This paper analyzes the impact of endogenous credit terms under capital market imperfections in a capacity investment setting. We model a monopolist firm that decides on its technology choice (flexible versus dedicated) and capacity level under demand uncertainty. Differing from the majority of the stochastic capacity investment literature, we assume that the firm is budget constrained and can relax its budget constraint by borrowing from a creditor. The creditor offers technology-specific loan contracts to the firm, after which the firm makes its technology choice and subsequent decisions. Capital market imperfections impose financing frictions on the firm. Our analysis contributes to …

Tls Newsletter. Volume 6, Edition 3. November, 2011, Unf Transportation And Logistics Society

Transportation & Logistics Society Newsletter

Inside the Newsletter: TLS Trivia Night, Wednesday November 9th. TLS President's Corner Tom Branning. TLS Community--Hubbard House and Propeller Club. TLS Tidbits: Business/Networking cards. Get to Know TLS Secretary Paula Nelson. TLS on Tour: Anheuser-Busch Brewmaster. Life after Graduation with Claudia Gorham.

Concentration In The Airline Industry: Evidence Of Economies Of Scale?, Ahren Johnston, John Ozment

Journal of Transportation Management

The early experience of the airline industry under deregulation was very much as expected, with increased competition and new entrants offering highly competitive rates. However, there are approximately 130 airlines operating today, and the industry remains more heavily concentrated than it was prior to deregulation. This study reports on concentration in the US airline industry between 1970 and 2009, as measured by the Hcrfindahl-Hirschman Index (HHI) and Concentration Ratio, together with changes in industry costs. The results show a trend of industry-wide reduced costs per available seat mile that is negatively correlated with the increased level of industry output over …

Cross-Cultural Validation Of The Factorial Structure Of A Logistics Strategy Model: A Three-Country Study, Michael A. Mcginnis, Talha Harcar, Ali Kara, John E. Spillan

Journal of Transportation Management

In 2011, McGinnis, Kohn, and Kara reported the effects of overall logisties strategy (OLS) on logistics coordination effectiveness, customer service effectiveness, and organizational competitive responsiveness. This manuscript empirically compares the three dimensions of the Bowersox Daugherty typology to logisties strategies among U.S., Turkish, and Guatemalan companies. US, Turkish, and Guatemalan subjects (logistics managers) were chosen to test the underlying factor structure and measurement equivalences of the scales used. Using confirmatory factor analysis (CFA), findings indicate that the three dimensions of the Overall Logistics Strategy (OLS) - Process Strategy, Market Strategy, and Information Strategy - hold in all three country environments …

A Commentary: The Perfect Storm: Schramm Decision, Fmcsa, And An Imposible Duty For Brokers And Third Party Logistics Companies, Paul Stewart

Journal of Transportation Management

Over the last thirty years, there never has been a more confused doctrine than the current “duty of reasonable care” faced by transportation brokers, third-party logistics companies and shippers as they select carriers for transport. The confusion in what was once reasonable and well understood law has been fueled by a perfect storm ofjudicial reasoning with misplaced reference to faulty empirical data, the complete failure of the Federal Motor Carrier Safety Administration (FMCSA) to properly assess carrier safety worthiness, a feeding frenzy by the plaintiffs’ bar and apathy by many in the industry. The purpose of this commentary is to …

Competitive Advantage And Fuel Efficiency In Aviation, Adam D. Reiman, Alan W. Johnson, William A. Cunningham

Journal of Transportation Management

This paper builds upon a resource based view of competitive advantage under a dynamic capabilities construct. Fuel efficiency measurement in the aviation industry can be incorporated into dynamic capabilities such as strategic decision making and alliancing. These dynamic capabilities can drive operational cost reductions, which in-turn can enhance profitability and establish a competitive advantage. To further this advantage, fuel efficiency can be embedded inside an organizational culture. A fuel efficiency focused organizational culture can be a valuable, rare, inimitable and non- substitutable resource. This paper proposes a model to merge the dynamic capabilities of strategic decision making and alliancing with …

Ltl Pricing: Looking Back To The Future, C. Clifford Defee, Joe B. Hanna, Robert Overstreet

Journal of Transportation Management

Numerous LTL carriers struggled during the recent recession as customers demanded lower prices. This study is designed to qualitatively evaluate the data gathered from three industry segments regarding LTL pricing. Researchers used semi-structured interviews to conduct an in-depth investigation with over two dozen industry experts who represented shippers, carriers, and 3PLs. Interview transcripts were analyzed using a grounded theory coding technique. Five major themes emerged from the interview transcripts. These themes are used to describe possible future adjustments to industry pricing structure.

Tls Newsletter Volume 6, Edition 2. October, 2011, Unf Transportation And Logistics Society

Transportation & Logistics Society Newsletter

Inside the Newsletter: TLS General Meeting, Wednesday October 12. TLS President's Corner. Upcoming Events. TLS on Tour--Football Fanatics Distribution Center. In the Know: Selling your personal brand. Get to know Vice President, Joey Elkana. Life after Graduation with Marta Cylwik