Dean C. Chatfield

Dean C. Chatfield
Old Dominion University | ODU · Department of Information Technology and Decision Sciences

PhD

About

27
Publications
7,445
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1,142
Citations

Publications

Publications (27)
Article
Inspired by the fact that a combination of network characteristics can describe a network more fully than the network type is able to, especially since some networks do not belong to any one specific type, this research effort investigates the relationship between network characteristics and supply chain resilience. We begin by demonstrating that t...
Article
Full-text available
We investigate the impact of order crossover on a periodic, order-up-to (R,S) inventory system where attaining a target service level is the focus. We first address two crossover related assumptions and then explore five methods of including crossover information into the process of determining the order-up-to level (S). We develop a hybrid discret...
Article
Full-text available
We investigate the impact of order crossover on a periodic, order-up-to (R,S) inventory system where attaining a target service level is the focus. Order crossover, when orders arrive in a sequence different from that in which they were originally placed, is increasingly likely to occur in modern supply chains. One reason for this is the increasing...
Article
We investigate the existence and magnitude of stockout propagation and stockout amplification in the context of supply chain inventory systems. Stockout amplification is a stage-to-stage increase in overall stockout rates. Stockout propagation is the tendency for stockout at one node to instigate a stockout at a neighbouring node and is conceptuall...
Article
We investigate the assumption of decomposability as it pertains to modelling the bullwhip effect in multi-stage supply chains. Decomposing a multi-stage supply chain into a set of node pairs, each of which can be efficiently represented with a two-stage model, is a common modelling technique when analysing the bullwhip effect in supply chains. This...
Article
We consider the reorder point, order quantity inventory model where the demand, D, and the lead time, L, are independently and identically distributed (iid) random variables. This model is analytically intractable because of order crossover. However, we show how to resolve the intractability by empirical means, for example, by regression relationsh...
Article
We develop an open information standard to assist supply chain modeling, analysis, and decision support. The Supply Chain Modeling Language (SCML) is a platform- and methodology-independent Extensible Markup Language (XML)-based markup language for storing supply chain structural and managerial information. SCML enables supply chain problem instanc...
Article
We consider the (D, 0) inventory model, where the demand per unit time, D, is stationary and independently and identically distributed (iid) and the lead time, L, is deterministic. In the case of the re-order point, order quantity (s, Q) system, where the cost function is convex in s and Q, this yields two equations that are solved iteratively to y...
Article
Full-text available
We present SISCO, the Simulator for Integrated Supply Chain Operations, a Java-based decision support tool that simplifies supply chain simulation model development. SISCO is designed to relieve users of simulation modeling and programming tasks, and to allow them to specify the structure and policies of a supply chain with a GUI-based application...
Article
The economic lot scheduling problem (ELSP) is the challenge of accommodating several products to be produced on a single machine in a cyclical pattern. A solution involves determining the repetitive production schedule for N products with a goal of minimizing the total of setup and holding costs. We develop the genetic lot scheduling (GLS) procedur...
Article
Lumpy demand is a phenomenon encountered in manufacturing or retailing when the items are slow-moving or too expensive, for example fighter plane engines. So far, the seminal procedure of Croston's (1972), with or without modifications, has been the preference for forecasting lumpy demand. Nevertheless, Croston (1974) and others, such as Venkitacha...
Article
Agent-based simulation models can effectively represent decentralized systems. However, many supply-chains are order-driven, and agent modeling cannot effectively represent the order life-cycle. We present a conceptual architecture that combines simulation formalisms, allowing an agent representation of the supply-chain infrastructure while enablin...
Article
We present SISCO, the Simulator for Integrated Supply Chain Operations, an object-oriented supply chain simulation tool. SISCO advances the concept of a supply chain simulator in a number of ways. With SISCO, we introduce a fundamentally new approach to supply chain specification, storage, and model generation. The user specifies the structure and...
Article
In a recent paper, Dejonckheere, Disney, Lambrecht, and Towill [European Journal of Operational Research 147 (2003) 567] used control systems engineering (transfer functions, frequency response, spectral analysis) to quantify the bullwhip effect. In the present paper, we, like Chen, Ryan, Drezner, and Simchi-Levi [Management Science 46 (2000) 436],...
Article
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Differences in estimation or forecasting procedures could produce dramatically different parameter estimates in supply chain inventory management. We show, for example, that determining when to introduce estimates of lead times in the calculation of the variance of demand during lead time can yield dramatically different safety stocks and order-up-...
Article
We propose an eXtensible Markup Language (XML)-centred approach to object-oriented simulation modelling of supply chains. Our approach is fundamentally different from previous work in that it uses XML to describe the supply chain itself, as opposed to using XML to store the simulation model. We define a system that includes an XML-based markup lang...
Article
We use a simulation model called ‘SISCO’ to examine the effects in supply chains of stochastic lead times and of information sharing and quality of that information in a periodic order-up-to level inventory system. We test the accuracy of the simulation by verifying the results in Chen et al. (2000a) and Dejonckheere et al. (2004). We find that lea...
Conference Paper
Full-text available
We describe a different approach to using XML to support the simulation modeling of supply chains. Instead of using XML to specify the simulation constructs, as most previous approaches do, we utilize XML to describe the supply chain itself. The supply chain modeling language (SCML) is a general, reusable, platform and methodology independent stand...
Article
In designing integrated supply chain information architecture, it is necessary to provide metrics for the different components of the system. Here, we present the metrics for security, for graphical user interface, for the hardware and the software, and for information and storage. Also relevant are metrics for the validation of the information tec...
Article
We investigate a serial supply chain, using a new simulation engine (SISCO; Chatfield, 2001). We begin with a serial supply chain with five nodes - customer, retailer, wholesaler, distributor, factory - and then verify the simulation results mathematically. We find that if the order system parameters remain unchanged there would be no Bullwhip Effe...
Conference Paper
Full-text available
We discuss SISCO, the Simulator for Integrated Supply Chain Operations, a Java-based tool that simplifies supply chain simulation model development. SISCO maps supply chain descriptions stored in the XML-based Supply Chain Modeling Language (SCML) format to a set of supply chain "building blocks" developed with ThreadTec's Silk<sup>TM </sup> simula...
Article
We discuss SISCO, the Simulator for Integrated Supply Chain Operations, a Java-based tool that simplifies supply chain simulation model development. SISCO maps supply chain descriptions stored in the XML-based Supply Chain Modeling Language (SCML) format to a set of supply chain "building blocks" developed with ThreadTec's Silk#8482; simulation cla...
Article
Thesis (Ph. D.)--Pennsylvania State University, 2001. Microfilm (positive).

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