Interfaces

Published by INFORMS
Online ISSN: 1526-551X
Publications
Article
In an era of limited healthcare budgets, mathematical models can be useful tools to identify cost-effective programs and to support policymakers in informed decision making. This paper reports results of our work carried out over several years with the Asian Liver Center at Stanford University, a nonprofit outreach and advocacy organization that is an international leader in the fight against hepatitis B and liver cancer. Hepatitis B is a vaccine-preventable viral disease that, if untreated, can lead to death from cirrhosis and liver cancer. Infection with hepatitis B is a major public health problem, particularly in Asian populations. We used new combinations of decision analysis and Markov models to analyze the cost-effectiveness of several interventions to combat hepatitis B in the United States and China. The results of our OR-based analyses have helped change United States public health policy on hepatitis B screening for millions of people and have helped encourage policymakers in China to enact legislation to provide free catch-up vaccination for hundreds of millions of children. These policies are an important step in eliminating health disparities, reducing discrimination, and ensuring that millions of people who need it can now receive hepatitis B vaccination or lifesaving treatment.
 
Article
We tested the effects of various of policy rules on retailer behavior in laboratory experiments conducted at Hewlett-Packard Laboratories. Our experimental design models the multifaceted contemporary market for consumer computer products and is quite complex, but we found that participants can make effective decisions and that their behavior is sensitive to variations in policies. Based on our results, Hewlett-Packard changed its policies; for example, it made the consequences for violations forward-looking as well as backward-looking). This line of research appears promising for complex industrial environments.
 
Article
Recent research shows that journal reviewing practices are neither objective nor fair. I propose a procedure to increase the likelihood of publishing important papers. This will be tested by Interfaces for a year.
 
Article
I designed a voting system for a professional association to ensure the equitable representation of different interests on its governing board. Approval voting, whereby voters can vote for as many candidates as they approve of, is combined with constraints on the numbers that can be elected from different categories of members to find the set of candidates most approved of by all voters, subject to the constraints.
 
Article
Policymakers need to know whether prediction is possible and, if so, whether any proposed forecasting method will provide forecasts that are substantially more accurate than those from the relevant benchmark method. An inspection of global temperature data suggests that temperature is subject to irregular variations on all relevant time scales, and that variations during the late 1900s were not unusual. In such a situation, a "no change" extrapolation is an appropriate benchmark forecasting method. We used the UK Met Office Hadley Centre's annual average thermometer data from 1850 through 2007 to examine the performance of the benchmark method. The accuracy of forecasts from the benchmark is such that even perfect forecasts would be unlikely to help policymakers. For example, mean absolute errors for the 20- and 50-year horizons were 0.18 � oC and 0.24 � oC respectively. We nevertheless demonstrate the use of benchmarking with the example of the Intergovernmental Panel on Climate Change's 1992 linear projection of long-term warming at a rate of 0.03 � oC per year. The small sample of errors from ex ante projections at 0.03 � oC per year for 1992 through 2008 was practically indistinguishable from the benchmark errors. Validation for long-term forecasting, however, requires a much longer horizon. Again using the IPCC warming rate for our demonstration, we projected the rate successively over a period analogous to that envisaged in their scenario of exponential CO2 growth--the years 1851 to 1975. The errors from the projections were more than seven times greater than the errors from the benchmark method. Relative errors were larger for longer forecast horizons. Our validation exercise illustrates the importance of determining whether it is possible to obtain forecasts that are more useful than those from a simple benchmark before making expensive policy decisions.
 
Article
Back haul problems occur in many areas of transportation. One-way rental often takes equipment, such as cases and containers, from an area of high demand to an area of low demand. The problem is to return the equipment to the location of need, a problem typically viewed as an administrative and scheduling problem. We developed a decentrali7cd approach in which a specially designed market organizes competition and information to minimize the cost of back-hauls without the direct intervention of administrative negotiations or command-and- control types of scheduling. We employed laboratory experimental methods to test the concept, examine its performance against theoretical benchmarks, and explore its limitations.
 
Cumulative visits to forecastingprinciples.com
Article
It is often claimed that managers do not read serious research papers in journals. If true, this neglect would seem to pose a problem because journals are the dominant source of knowledge in management science. By examining results from the forecasting principles project, which was designed to summarize all useful knowledge in forecasting, we found that journals have provided 89 percent of the useful knowledge. However, journal papers relevant to practice are difficult to find because fewer than three percent of papers on forecasting contain useful findings. That turns out to be about one useful paper per month over the last half-century. Once found, the papers are difficult to interpret. Managers need low-cost, easily accessible sources that summarize advice (principles) from research; journals do not meet this need. To increase the rate of progress in developing and communicating principles, researchers, journal editors, textbook writers, software developers, web site designers, and practitioners should make some changes. Some examples: Researchers should directly study forecasting principles. Journal editors should actively solicit papers – invited submissions were about 20 times better than standard submissions at producing useful findings that were often cited, and does so at a lower cost. Web-site and software developers should provide practitioners with low-cost ways to use principles. Practitioners should apply the principles that are currently available.
 
The four-step production process of powershift transmissions includes the cold-steel shop, heat treatment, the hard-steel shop, and final assembly.
This detailed view shows the hard-steel shop (top part), the cold-steel shop (lower part), the AGV (automative guided vehicle), and the AS/RS (automatic storage and retrieval system). All machines are arranged around two high-stacker cranes. At the start of the project, machines were typically arranged in a job-shop layout. Later on in the project, management decided to adopt cellular manufacturing
Article
Spicer Off-Highway Products Division (a division of Dana Corporation) asked us to develop OR tools to improve the due date performance and to shorten the manufacturing lead time of its powershift transmission plant in Brugge, Belgium. We modelled the manufacturing system as a queueing model, and used the model to analyze and evaluate improvement schemes (layout changes, product-mix decisions, lot-sizing decisions, and lead time estimations). Next, we developed a finite scheduler to improve the detailed scheduling of the shop. Our modelling effort contributed to the successful combination of analysis, planning and detailed scheduling. The plant increased productivity by 27.3 percentage points, decreased manufacturing lead times by a factor two to three, increased its workforce by 41 percent, and decreased its operating costs. The division is now profitable.
 
Correlations with sample sizes of 32 and 16 to 18.
Principal components analysis.
Article
We examined the relationships between the research originating at business schools, students^R satisfaction with the schools, and the published ratings of the school^Rs prestige. Research was positively correlated to prestige (where prestige was based on the perceptions of academics, firms, and student candidates). The satisfaction of recent graduates was not related to a school^Rs prestige (based on the perceptions of academics and business firms). Research productivity of schools was not associated with lower satisfaction among their recent graduates. We conclude that schools should emphasize research instead of teaching if they desire high prestige.
 
Article
A combinatorial auction is an auction where multiple items are for sale simultaneously to a set of buyers. Furthermore, buyers are allowed to place bids on subsets of the available items. This paper focusses on a combinatorial auction where a bidder can express his preferences by means of a so-called ordered matrix bid. This matrix bid auction was developed by Day (2004) and allows bids on all possible subsets, although there are restrictions on what a bidder can bid for these sets. We give an overview of how this auction works. We elaborate on the relevance of the matrix bid auction and we develop methods to verify whether a given matrix bid satisfies a number of properties related to micro-economic theory. Finally, we investigate how a collection of arbitrary bids can be represented as a matrix bid.Keywords: Combinatorial auction, matrix bids, free disposal,subadditivity, submodularity, gross substitutes, expressiveness
 
Article
Ever more companies are recognizing the benefits of closed-loop supply chains that integrate product returns into business operations. IBM has been among the pioneers seeking to unlock the value dormant in these resources. We report on a project exploiting product returns as a source of spare parts. Key decisions include the choice of recovery opportunities to use, the channel design, and the coordination of alternative supply sources. We developed an analytic inventory control model and a simulation model to address these issues. Our results show that procurement cost savings largely outweigh reverse logistics costs and that information management is key to an efficient solution. Our recommendations provide a basis for significantly expanding the usage of the novel parts supply source, which allows for cutting procurement costs.
 
Article
This paper examines the introduction of information-sharing into the supply chains for pharmaceutical products in the United States. This introduction was unusual for several reasons. First, it was catalyzed from outside the industry, by a Securities and Exchange Commission (SEC) investigation into improper financial reporting by a single manufacturer. Second, it was initiated by pharmaceutical manufacturers in order to keep distributor inventories low. Third, although its effect on pharmaceutical distributors has been profound, evidence indicates that information-sharing has had no impact on pharmaceutical manufacturers' own inventorymanagement practices.
 
Article
Formal education can be improved by transferring responsibility from the teacher to the learner. A simple approach to this is the time contract. Time contracts have been used successfully in nine quasi-experiments but, despite these successes, some educators see this as subversive research.
 
Article
The commentators raised many interesting ideas in response to Armstrong and Pagell (2003), from which one general theme emerges: The commentators claim that management science lacks the incentives to encourage efforts to develop and communicate grounded principles. As a result, academics often conduct their research as an intellectual exercise with little concern as to whether their findings might eventually be of any practical use. The problem extends beyond management science. Smith (1991), an editor of the British Medical Journal, concluded from a review that only about 15 percent of medical interventions are supported by solid scientific evidence. He attributes this disconnect to an estimate that only about one percent of articles in medical journals are scientifically sound. Such results indicate problems with incentives in research.
 
Article
Sophisticated extrapolation techniques have had a negligible payoff for accuracy in forecasting. As a result, major changes are proposed for the allocation of the funds for future research on extrapolation. Meanwhile, simple methods and the combination of forecasts are recommended.
 
Accuracy of unaided-judgment forecasts Percent correct forecasts (number of forecasts)
Accuracy of novices' frequency and singular forecasts Percent correct forecasts (number of forecasts)
Article
In important conflicts, people typically rely on experts' judgments to predict the decisions that adversaries will make. We compared the accuracy of 106 expert and 169 novice forecasts for eight real conflicts. The forecasts of experts using unaided judgment were little better than those of novices, and neither were much better than simply guessing. The forecasts of experts with more experience were no more accurate than those with less. Speculating that consideration of the relative frequency of decisions might improve accuracy, we obtained 89 forecasts from novices instructed to assume there were 100 similar situations and to ascribe frequencies to decisions. Their forecasts were no more accurate than 96 forecasts from novices asked to pick the most likely decision. We conclude that expert judgment should not be used for predicting decisions that people will make in conflicts. Their use might lead decision makers to overlook other, more useful, approaches.
 
Article
An approach is described to develop a formal corporate strategic planning process in a business firm. Three levels of planning are recognized: corporate, business, and functional. A methodology is presented suggesting the tasks that have to be performed at each level leading toward the formulation of strategies, programs, and budgets. Examples are offered to illustrate the applicability of this methodology.
 
Article
Although to date computer technology has been used primarily to automate paperwork, recently we have entered an era in which information availability and new communication processes are having a significant impact on corporate life. In a conceptual model of this phenomenon, one aspect, the way in which technology is now driving corporate strategy, is emphasized.
 
Article
I worked on modeling integrated steel plants in India (as an analyst) and in the USA (as a doctoral student). The following factors influence the successful OR/MS practice: positioning of OR/MS in Operations and not in Research and Development, selecting the right problem, emphasising on problem solving and not on model building, learning lessons from failure, right academic and practical training of OR teams, experiences of working in the shop-floor of a factory. Universities should give more emphasis in teaching OR as research in operations and to the process of implementation.
 
Article
We ask various experts, who produce sales forecasts that can differ from earlier received model-based forecasts, what they do and why they do so. A questionnaire with a range of questions was completed by no less than forty-two such experts who are located in twenty different countries. We correlate the answers to these questions with actual behavior of the experts. Our main findings are that experts have a tendency to double count and to react strongly to recent volatility in sales data. Also, experts who feel more confident give forecasts that differ most from model-based forecasts.
 
Article
The number of on-line computer applications that exist today gives ample testimony that the computer hardware business has come of age. About fifteen years ago, IBM built the SAGE system which, for the first time, tied computers together with a number of other components. A large central processor communicated with a number of peripheral processors that controlled radar units. Every component had to be specially designed and built at no small cost. Today, the components of a similar system would be standard, with a computer, the interfaces, and the teleprocessing all catalog items.
 
An Analysis of Error in Predictions of US Political Elections 
The Letter F Test: Confidence is Not Related to Accuracy 
Progress in Research on Forecasting Research from 1960 to 1984 
Article
Before 1960, little empirical research was done on forecasting methods. Since then, the literature has grown rapidly, especially in the area of judgmental forecasting. This research supports and adds to the forecasting guidelines proposed before 1960, such as the value of combining forecasts. New findings have led to significant gains in our ability to forecast and to help people to use forecasts. What have we reamed about forecasting over the past quarter century? Does recent research provide guidance for making more accurate forecasts, obtaining better assessments of uncertainty, or gaining acceptance of our forecasts?
 
Figure B.1  
Article
Combined-value auctions (CVAs) allow participants to make an offer of a single amount for a collection of items. These auctions provide value to both buyers and sellers of goods or services in a number of environments, but they have rarely been implemented, perhaps because of lack of knowledge and experience. Sears Logistics Services (SLS) is the first procurer of trucking services to use a CVA to reduce its costs. In 1993, it saved 13 percent over past procurement practices. Experimental economics played a crucial role in the development, sale, and use of the CVA.
 
Figure B.1  
Article
Combined value auctions (CVAs) allow participants to make an offer of a single amount for a collection of items. These auctions provide value to both buyers and sellers of goods or services in a number of environments, but they have rarely been implemented, perhaps because of lack of knowledge and experience. Sears Logistics Services (SLS) is the first procurer of trucking services to use a CVA to reduce its costs. In 1993 they saved 13% over past procurement practices. Experimental economics played a crucial role in the development, sale, and use of the CVA * .
 
INSERT Detroit Elimination HTML Can the Tigers win the pennant? 
Article
The competition for baseball playoff spots -- the fabled "pennant race" -- is one of the most closely-watched American sports traditions. Baseball fans, known for their love of statistics, check newspapers and web sites daily looking for measures of their team's progress (or lack thereof !). While traditionally-reported playoff race statistics such as games back and "magic number" are informative, they are overly conservative and ignore the remaining schedule of games. By using optimization techniques, one can model schedule effects explicitly and determine when a team has locked up a playoff spot or is truly "mathematically eliminated" from contention. This paper describes the Baseball Playoff Races web site, a popular site developed at Berkeley that provides automatic daily updates of new, optimization-based playoff race statistics. During the development of the site, it was found that the first-place elimination status of all teams in a division can be determined using a single linear prog...
 
Article
Management folklore sometimes leads to unprofitable decision making. Thus, studies of the value of such folklore should be of interest to managers, especially when they identify unprofitable procedures. I reviewed empirical research on scientific publishing and concluded that studies supporting management folklore are likely to be favorably reviewed for publication and to be cited. However, researchers who obtain findings that refute folklore are likely to encounter resistance in publication and are less likely to be cited. My experience with papers on portfolio planning methods and escalation bias illustrates the problem. To encourage the publication of papers that challenge management folklore, editors should use results-blind reviews and, in some cases, constrain, reduce, or eliminate peer review. Management contains folklore. By folklore, I mean techniques and concepts that managers adopt without any formal evaluation of their effectiveness simply because others are using them. Som...
 
Forecast Weekly Repeat Sales
Article
We describe a modeling exercise, conducted in conjunction with the online music retailer CDNOW, where the goal was to develop a simple stochastic model of buyer behavior capable of generating a medium-term forecast of aggregate CD purchasing by a cohort of new customers. Weekly sales are modeled using a finite mixture of beta-geometric distributions with a separate time-varying component to capture nonstationarity in repeat buying. The resulting model can easily be implemented within a standard spreadsheet environment (e.g., Microsoft Excel). We demonstrate that the model does a good job at describing the underlying sales patterns, as well as generating an excellent medium-term forecast. 1 Introduction With the growth of e-commerce, many companies are now capturing transaction data of such detail that could have only been dreamed of ten years ago. The challenge facing them is what to do with the data that are rapidly accumulating within their databases. While the literature on dat...
 
Article
This paper was refereed. COMPLETING LOOPS May-June 1995 43
 
Article
Since the inception of human-computer interaction as a design discipline, the principal approach to understanding quality of interaction has been through the concept of usability, its definition and measurement. Despite the obvious success of this approach to understanding quality of interaction, new technologies and application areas present challenges to this way of analysing and evaluating human interaction with computers. User experience has recently become a popular term to capture concerns for a more holistic view of user interaction. There have been a number of recent papers addressing this issue, but this work has not yet led to a coherent framework or set of analytical tools for analysing user experience. In this talk we wish to ask some fundamental questions about the nature of user experience. Taking Dewey's pragmatist aesthetics as our starting point, we look towards a diverse literature from media, arts and human sciences for inspiration concerning how we might talk about user experience. Our research takes us to Laurel's work on HCI as Theatre as a natural starting point. She attempts to bring a new way of looking at the interaction of people and computers based on drama theory and identifies engagement as a form of user experience in which emotional and intellectual components both play a part. We also visit Boorstin's work on Hollywood movie making. He identifies three ways of experiencing film which open up spaces for talking about visceral, emotional and intellectual experience.
 
Article
videnced, for example, by the optimization-model statements in appendices to many Interfaces papers. To support this model-building activity, specialized modeling systems have been developed for building, analyzing, and maintaining optimization models. These systems handle models independently of the choice of solver and so can be hooked to a variety OPTIMIZATION March--April2rc 131 of solvers. Conversely, popular solvers work with a selection of modeling systems. The analyst who wants to build an optimization application must consequently sort through quite a tangle of software. This is in contrast to the situation to such areas as statistics or simulation, where the software principally consists of integrated packages of modeling tools and modelanalysis methods. And this is where Internet services enter the picture, as providers of guidance and access to the daunting variety of optimization software. Prelimina5d2 By optimiz
 
Article
This special issue of Interfaces presents the finalists and winners of the 33rd annual competition for the Franz Edelman Award for Achievement in Operations Research and the Management Sciences, the profession's prestigious award for the practice of operations research and the management sciences. Thomas Spencer III, chairman of the competition, and Stephen C. Graves, editor of the special issue, provide an overview of the competition and introduce the finalists and winner.
 
Article
This special issue of Interfaces is devoted to the finalists of the 41st annual competition for the Franz Edelman Award for Achievement in Operations Research and the Management Sciences, the profession's prestigious award for the practice of operations research and business analytics. As in previous years, the finalists this year cover a wide range of industries, functions, and countries around the globe.
 
Article
This special issue of Interfaces is devoted to the finalists of the 36th annual competition for the Franz Edelman Award for Achievement in Operations Research and the Management Sciences, the profession's prestigious award for the practice of operations research. Brian Denton, chair of the competition, and ManMohan S. Sodhi, editor of this special issue, provide an overview of the competition and introduce the finalists.
 
Article
This special issue of Interfaces is devoted to the finalists of the 37th annual competition for the Franz Edelman Award for Achievement in Operations Research and the Management Sciences, the profession's prestigious award for the practice of operations research. Of the six entries, one demonstrates the benefits derived from OR/MS-based scheduling for the care of the elderly in Sweden. The second shows dramatic improvement in air traffic management with new weather-system-related policies in the United States. The third shows how to improve network configuration and routing of natural gas in Norway and neighboring countries. The fourth shows how to place contaminant sensors in water sources and its application in the United States. The fifth reflects productivity improvements in print shops and document manufacturing facilities, also in the United States. The final entry shows how OR/MS was used to construct a brand new timetable for the passenger railway system in The Netherlands to account for much higher demand on the system.
 
Article
Competition for the 2011 Daniel H. Wagner Prize for Excellence in Operations Research Practice provided the six finalist papers featured in this special issue of Interfaces. The prestigious Wagner Prize, awarded for achievement in implemented operations research and advanced analytics, emphasizes quality and originality of mathematical models along with clarity of written and oral exposition. Operations research professionals from Intel Corporation won the competition with uniquely comprehensive models to support product planning—determining what products to offer and what features each should have—over a multistage planning period; recently their models were in use by over 250 Intel personnel from most major Intel groups, and were integrating many previously separate business processes. The challenge in a public school system of creating schedules for experimental schools that offer highly individualized instruction provided the setting when the New York City Department of Education called upon a research team from Analytics Operations Engineering, Inc.; new methods developed enabled administrators to better satisfy student needs, while reducing the time devoted to scheduling at a school from roughly eight weeks to roughly two weeks. A team from the University of Texas and Texas A&M University invented methods to help Internet advertising firm Chitika make its ads more effective; implementation increased Chitika's revenues while helping Chitika sign up more site publishers to run its ads. La Poste, the French national postal service, working with a team from INSEAD and from the WHU—Otto Beisheim School of Management, derived a preferred strategy for adopting electric delivery vehicles over time; the team's analysis assisted La Poste in its vehicle acquisition planning and also in related negotiations with energy companies and electric vehicle manufacturers. A team from the University of Waterloo and the University of Michigan collaborated with Ford Motor Company to develop analytical methods for planning and scheduling in especially complex manufacturing situations, such as in stamping plants, where setup times are important; Ford's utilization of these methods has produced significant benefits, including reductions in inventory costs, freight charges, and overtime wages. To help plan a major new exhibit, the Georgia Aquarium teamed with researchers from the Georgia Institute of Technology; recommendations based on the researchers' original analytical methods resulted in a better-than-anticipated exhibit design characterized by improved overall experience for guests, lower operating costs, enhanced treatment of the dolphins, and improvements in operations and show scheduling.
 
Article
This special issue of Interfaces is devoted to the finalists of the 38th annual competition for the Franz Edelman Award for Achievement in Operations Research and the Management Sciences, the profession's prestigious award for the practice of operations research. Of the six papers in this issue, one demonstrates the benefits from OR/MS-based scheduling of empty railcars based on customer orders at CSX. The second, the winner of the Edelman Award, shows how HP manages a product portfolio in the dynamic electronics industry. The third describes how IBM uses OR models to improve sales force productivity. The fourth reflects the development and deployment of OR-based revenue management for group pricing at Marriott. The fifth discusses the use of OR models for tactical and strategic decisions around supply chain planning and capacity at Norske Skog, including such difficult decisions as closing plants. The sixth entry shows how Zara deploys inventory from two central warehouses to stores worldwide using OR.
 
Article
Competition for the 2014 Daniel H. Wagner Prize for Excellence in Operations Research Practice provided the six finalist papers featured in this special issue of Interfaces. The prestigious Wagner Prize-awarded for achievement in implemented operations research and advanced analytics-emphasizes quality and originality of mathematical models and clarity of written and oral exposition. Researchers from MIT, Duke University, Cornell University, and the client organization, Ford Motor Company, won the competition for the design and successful implementation of a novel risk-exposure model that more accurately assesses the impact of potential major disruptions originating anywhere in the firm's supply chain. The remaining finalist papers describe work to improve funding of new-product-development projects, assignment of airline pilots, organization and management of emergency vaccination facilities during a pandemic, reformulation of laundry products, and allocation of deceased-donated livers to transplant patients.
 
Article
This special issue of Interfaces is devoted to the finalists of the 39th annual competition for the Franz Edelman Award for Achievement in Operations Research and the Management Sciences, the profession's prestigious award for the practice of operations research. The six finalists this year cover a wide range of industries, functions, and countries around the globe. The winning entry demonstrates the use of operations research (OR) by INDEVAL, Mexico's central financial securities depository, to decrease daily liquidity requirements by $130 billion. One finalist entry describes the OR analyses and the politics that led to the implementation of optimization-based water-release policies by the Delaware River Basin Commission. Another entry shows how OR models were used to increase the brand value of Deutsche Post DHL in Germany by over $1 billion in five years. A fourth reflects the development and deployment of OR-based tools at New Brunswick Department of Transportation to save over $70 million per year in maintaining 18,000 kilometers of roads. Yet another entry discusses the use of single-stage and multiechelon inventory optimization techniques to reduce Procter & Gamble's investment in inventory by $1.5 billion. A sixth entry describes the use of simulation models to save approximately $230 million over a 10-year period at the Sasol Synfuels coal-to-liquids conversion facility in South Africa.
 
Article
The pantheon of 20th century US Army generals contains many great wartime commanders. Military historians have written about their leadership qualities but have not ranked the best generals. We asked 10 experts in US military history to evaluate seven generals---Omar Bradley, Dwight Eisenhower, Douglas MacArthur, George Marshall, George Patton, John Pershing, and Matthew Ridgway---using the analytic hierarchy process in a group setting. We developed a ratings hierarchy, and each participant scored each general. We combined individual pairwise comparisons using the geometric-mean method and a new method based on linear programming and obtained a clear, three-tier ranking of generals with George Marshall judged the best US Army general of the 20th century, closely followed by Dwight Eisenhower.
 
Article
"Practice Abstracts" carries short reports of specific current or recent OR/MS projects. Often these reports are based on existing documents, such as internal reports or company newsletters. We hope that these abstracts will be accessible, interesting, and valuable to practitioners in other organizations. Contributions should be sent for evaluation to the editor of "Practice Abstracts," Donald L. Keefer, Department of Supply Chain Management, Arizona State University, Box 874706, Tempe, Arizona 85287-4706 ([email protected] /* */).
 
Article
"Practice Abstracts" carries short reports of specific current or recent OR/MS projects. Often these reports are based on existing documents, such as internal reports or company newsletters. We hope that these abstracts will be accessible, interesting, and valuable to practitioners in other organizations. Contributions should be sent for evaluation to the editor of "Practice Abstracts," Donald L. Keefer, Department of Supply Chain Management, Arizona State University, Box 874706, Tempe, Arizona 85287-4706 ([email protected] /* */).
 
Article
The goal of “Practice Abstracts” is to present interesting, topical, and novel applications of operations research methodology to a wide range of industrial applications. “Practice Abstracts” are intended to provide Interfaces readers with short (2--4 pages) descriptions of the most relevant aspects of operations research-based projects, in a form that is accessible to academics and practitioners in other organizations. Contributions should be sent for evaluation to the editor of “Practice Abstracts,” Brian T. Denton, Edward P. Fitts Department of Industrial and Systems Engineering, North Carolina State University, 370 Daniels Hall, 111 Lampe Drive, Raleigh, North Carolina 27695-7906, bdenton@ncsu.edu.
 
Top-cited authors
Fred Glover
  • University of Colorado Boulder
Gerald Brown
  • Naval Postgraduate School
Terry Paul Harrison
  • Pennsylvania State University
Shad Dowlatshahi
  • University of Missouri - Kansas City
Barry Smith