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Articles 31 - 42 of 42
Full-Text Articles in Operations and Supply Chain Management
R&D Project Portfolio Selection With Multiple Stakeholders, Wenqi Lian
R&D Project Portfolio Selection With Multiple Stakeholders, Wenqi Lian
Dissertations and Theses Collection (Open Access)
Research and Development (R&D) is time consuming, expensive and risky; yet product life cycles are shortening and competition is fierce. Therefore, R&D often requires the collaboration and input of multiple stakeholders. This dissertation studies how collaborations involving multiple stakeholders can effectively make R&D project portfolio selection decisions to create the optimal social welfare. The two essays in the dissertation build stylized analytical models to examine R&D project portfolio selection in two different settings, academia and industry respectively. The models explicitly acknowledge the different information, goals and operational decisions of the stakeholders. In the first essay, we study a two-stage funding …
Essays On Agricultural Commodity Processing, Bin Li
Essays On Agricultural Commodity Processing, Bin Li
Dissertations and Theses Collection (Open Access)
This dissertation investigates two important issues in agricultural commodity processing: (i) biomass commercialization; that is, converting organic waste into a saleable product, from economic and environmental perspectives, and (ii) optimal procurement portfolio design using multiple suppliers and spot market, and the impact of by-product introduction on this optimal portfolio.
The first chapter examines the economic implications of biomass commercialization from the perspective of an agri-processor that uses a commodity input to produce both a commodity output and biomass. We characterize the value of biomass commercialization and perform sensitivity analysis to investigate how spot price uncertainty (input and output spot price …
Too Good To Eat? Cosmetic Standards And Waste In Agricultural Supply Chain, Jiahui Xu
Too Good To Eat? Cosmetic Standards And Waste In Agricultural Supply Chain, Jiahui Xu
Dissertations and Theses Collection (Open Access)
There is a significant amount of food wasted at the farm level due to high cosmetic standards adopted by retailers. We examine the economic incentives for retailers to adopt such high cosmetic standards and their impact on food loss. We build a sequential game between a retailer and a farmer, where the retailer signs a contract with the farmer specifying both the wholesale price and cosmetic quality standard. By adopting high cosmetic standards, retailers can motivate farmers to exert a higher effort to improve the cosmetic quality, e.g., using better seeds and applying more pesticides. As for the drivers of …
A Remanufacturing News-Vendor With Pricing And Take-Back Pricing, Keyu Lu
A Remanufacturing News-Vendor With Pricing And Take-Back Pricing, Keyu Lu
Dissertations and Theses Collection (Open Access)
This paper analyzes the problem of a remanufacturing news-vendor with selling and take-back price decision. In our model, the remanufacturer decides selling price, take-back price, and order quantity for new materials. She then uses the stochastic take-back quantity and the new material to meet the stochastic demand comparably to a news vendor setting. We allow demand and take-back supply to be correlated. In this thesis, we study a production problem with dual input sources: raw materials and recycled or remanufactured take-back items. To answer when mixed-sourcing is best, we analyze the model under deterministic setting first, provide criteria for different …
Aircraft Leasing With Contracts, Qiong Zuo
Aircraft Leasing With Contracts, Qiong Zuo
Dissertations and Theses Collection (Open Access)
We study a problem of rental rate pricing and rental contract designing in aircraft leasing industry. In a framework of Stackelberg game, the system is composed of an airline company (carrier) and an aircraft leasing company (lessor). Acting as the leader, the lessor announces daily rental rates and/or provides long-term contracts on a finite horizon with multiple periods. For each period, the carrier determines the aircraft leasing number to adjust the flight capacity, and applies a dynamic pricing policy for air-tickets based on a seasonally stochastic demand and some economic factor, such as oil price. We find the optimal policies …
Dynamic Quay Crane Allocation, Yan Zhang
Dynamic Quay Crane Allocation, Yan Zhang
Dissertations and Theses Collection (Open Access)
We introduce simple rules for quay cranes to handle containers along a berth where vessels arrive continuously in time. We first analyze a model where workload is continuous. Our analysis shows that if the system is configured properly, it will always converge to a state with the maximum possible throughput regardless of external disruptions or changes in workload. Numerical simulations based on a discrete workload model suggest that, by following the same rules, the system can still converge to state with throughput that is very close to its upper bound.
Pricing And Inventory Control In Dual-Channel Network With One Manufacturer And Retailer, Zhicong Pan
Pricing And Inventory Control In Dual-Channel Network With One Manufacturer And Retailer, Zhicong Pan
Dissertations and Theses Collection (Open Access)
The study on multi-channel problems has been one of the most active research fields in recent years. In this paper, we consider a dual-channel network problem with one manufacture and one retailer. The manufacturer, acting as the Stackelberg leader, sells a single type of product through a traditional channel to the retailer and/or through a direct channel to customers. The retailer, acting as the follower, operates a Newsvendor model, ordering from the manufacturer and selling to the customers. We study the problem with the deterministic demand. We develop an efficient algorithm to find the joint optimal policy for three prices: …
A Flexible Payment Scheme In Hotel Business, Ciwei Dong
A Flexible Payment Scheme In Hotel Business, Ciwei Dong
Dissertations and Theses Collection (Open Access)
This paper introduces a flexible payment scheme in the hotel business. When a customer makes a reservation for a hotel room, the hotel offers an optional payment scheme (Scheme O). If the customer chooses the Scheme O, he/she makes a non-refundable down payment immediately. Meanwhile, the hotel offers a discount if the customer actually checks in to the hotel. Thus, the payment at check-out time is much lower than the original rental rate. Alternatively, if the customer rejects the Scheme O, the reservation is made under a traditional Scheme (Scheme T), where no down payment is required. However, the customer …
Risk Response Strategies In The Supply Chain: Examining Attributes Of Stakeholders And Risk Attitude, Shu Jian Lim
Risk Response Strategies In The Supply Chain: Examining Attributes Of Stakeholders And Risk Attitude, Shu Jian Lim
Dissertations and Theses Collection (Open Access)
Supply chain management is about managing flows of material, information and funds in a complex network of entities of suppliers, manufacturers, distributors and customers. Companies are now connected in this network as an extended enterprise and any company may be involved in more than one such extended enterprises. But, such a network of relationships is very much vulnerable to disruptions of all sorts ranging from internal to inter-firm and to external turbulences. Companies now need to be prepared for risks associated with their participation in the supply chain network. Not many works in the literature have used theories to study …
Pricing And Lead Time Decisions In A Duopoly Common Retailer Channel, Xiuming Niu
Pricing And Lead Time Decisions In A Duopoly Common Retailer Channel, Xiuming Niu
Dissertations and Theses Collection (Open Access)
This thesis studies a dual-level decentralized supply chain consisting of two suppliers and two retailers facing a price- and lead-time-sensitive demand. We model the suppliers’ operations as M/M/1 queues and demand as a linear function of the retail prices and promised delivery lead-times offered to the customers. Three different kinds of games are constructed to analyze the pricing and lead-time decisions of the suppliers and retailers. We show the existence of a unique equilibrium in all games and provide the exact formulas to compute the optimal decisions for both the suppliers and retailers. We further present numerical examples to illustrate …
Procure Financing For Shipping By Auctions, Kekun Wu
Procure Financing For Shipping By Auctions, Kekun Wu
Dissertations and Theses Collection (Open Access)
We study a risk management problem in the scenario of ship procurement. A shipping firm faces a certain financing pressure for the procurement of a new ship. On the other hand, the capacity of the ship excesses the demand requirement of the firm. The firm wants to reduce the payment and control the risk by selling a percentage of capacity to another shipping company. We introduce an auction mechanism for the firm to select the partner and determine the sharing percentage. Acting as the auctioneer, the firm announces a certain percentage of capacity to a set of buyers. The payment …
A Metaheuristic For The Pickup And Delivery Problem With Split-Loads And Its Extension, Dai Yao
A Metaheuristic For The Pickup And Delivery Problem With Split-Loads And Its Extension, Dai Yao
Dissertations and Theses Collection (Open Access)
In this dissertation, we study improvements in the Pickup and Delivery Problem that can be achieved by allowing multiple vehicle trips to serve a common load. We explore how costs can be reduced through the elimination of the constraint that a load must be served by only one vehicle trip. Specifically, we investigate the problem of routing vehicles to serve loads that have distinct origins and destinations, with no constraint on the amount of a load that a vehicle may serve at a time. We develop a metaheuristic to solve large scale practical size problems in this form and apply …