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Press Articles - submit!
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Web Services: OR's Newest Ally? - ORMS Today
By employing open XML-based standards, emerging technology promises to reduce time and cost of building business applications.
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Observations on PCB Assembly Optimization - Electronic Packaging and Production Online
A hierarchical classification scheme based on the number of machines (one or many) and number of boards (one or many) can ease Printed Circuit Board (PCB) assembly optimization problems.
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Presentations - submit!
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Program != Program: Constraint Programming and Its Relationship to Mathematical Programming - Dr. Irv Lustig
Presented by ILOG Optimization Evangelist Dr. Irv Lustig, this 30-minute long presentation covers how constraint programming is an alternative and complementary method to mathematical programming for solving optimization problems.
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Semidefinite Relaxations for Hard Combinatorial Problems - Henry Wolkowicz
Semidefinite Programming is currently a very exciting and active area of
research.
Semidefinite relaxations generally provide very
tight bounds for many
classes of numerically hard problems.
In addition, these relaxations can be
solved efficiently by interior-point methods.
In this paper we study these semidefinite relaxations
using the equivalent Lagrangian relaxations.
In particular, the theme of the paper is to show that the Lagrangian
relaxation is, in some respects, best. In all instances we consider,
we show that whenever we have a
tractable bound (relaxation), then the same bound can be obtained from a
Lagrangian relaxation.
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Analyst Reports - submit!
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APS: Is It As Good As It Sounds? - John Bermudez
Advanced Planning and Scheduling (APS) has been the hottest segment of the enterprise applications market for the last two years, with a 70% compound annual growth rate (CAGR). Fueling this growth, manufacturers faced with the challenges of simultaneously reducing costs and improving customer service have been early adopters of APS as part of their supply chain management strategies. Early results are spectacular as APS technology takes on previously unsolvable planning problems. While many more manufacturers are interested in APS, the too-good-to-be-true claims and high product costs have caused most companies to proceed cautiously. In this Report, AMR reviews the scope of current APS solutions and provides findings from an in-depth look at existing implementations in a variety of industries
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Introduction to APS - John Bermudez
In this report AMR will examine Advanced Planning and Scheduling (APS) systems, perhaps the hottest segment of the industrial software market. We do not believe that these systems are just another example of a "technology in search of a problem." Instead, they are a superb example of innovative software developers using advanced technologies to respond to the requirements of a new business paradigm. In order to compete effectively in today's global markets, manufacturers have adopted new business practices such as just-in-time (JIT), flow manufacturing, mass customization, and integrated supply chain management. These techniques have exposed the deficiencies of older planning and scheduling tools and created a rapidly growing market for more sophisticated and responsive planning and decision support systems. Given the increasing complexity of manufacturing supply chains and the benefits experienced by early APS users, we expect this market to expand dramatically over the next several years.
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Brochures - submit!
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LGO Modeling and Solver System for Global (General Nonlinear) Optimization - Janos D. Pinter, Pinter Consulting Services Inc.
This technical information brochure summarizes the main features of the LGO modeling
and solver system for nonlinear - spcifically including global - optimization.
An extensive list of related references and materials (including research articles, applications
and case studies, as well as software demonstration packages) is available from
Janos D. Pinter, M.Sc., Ph.D., D.Sc.
President & Research Scientist
Pinter Consulting Services Inc.
Adjunct Professor, Dalhousie University
Address: 129 Glenforest Drive, Halifax, NS, Canada B3M 1J2
Phone: 1-(902)-443-5910
Fax: 1-(902)-431-5100 1-(902)-443-5910
E-mail: jdpinter@hfx.eastlink.ca jdpinter@is.dal.ca
Web: http://is.dal.ca/~jdpinter
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Modeling with XpressMP -
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Books - submit!
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Business Process Orientation: Gaining the E-Business Competitive Advantage - Kevin McCormack and Bill Johnson
Several concepts have developed during the last few years related to business processes, organizations and performance. Process centering, business process orientation (BPO), the horizontal corporation and the reengineered e-corporation have all been proposed as significantly impacting both long and short-term performance of an organization. Specifically, the horizontal integration of supply chains, both internally and externally, has been proposed as the key to competitive success. The resulting process oriented e-corporation is now positioned as a necessity for survival beyond 2000. Using the results from a multi-year research study of manufacturing firms, services firms, and various supply chains both in the US and Europe, this book presents an expanded definition of this concept and a quantitative measurement of business process orientation. Subsequent studies using this instrument to measure the impact of BPO on organizational performance are also discussed in depth. Finally, a BPO benchmarking tool using a maturity model framework is proposed for use in evaluating an organization's progress toward process mastery.
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Iterative Learning Control: Convergence,Robustness and Applications - Chen,Yangquan and Wen,Changyun
A system is called a `repetitive system' when it performs a given task repeatedly. Robotic and functional neuromuscular stimulation systems are examples of such systems. Iterative Learning Control (ILC), which is a relatively new area in the field of control, is proposed to control these types of systems.
Generally speaking, a system under control may have uncertainties in its dynamic model and its environment. One attractive point in ILC is the utilisation of the system repetitiveness to reduce such uncertainties and in turn to improve the control performance by operating the system repeatedly. ILC is a feedforward control strategy that updates, through iterative learning, control signals at every repeated operation. As the number of iterations increases, the system tracking error over the entire operation time period including the transient portion will decrease and eventually vanish. This may not be possible for conventional non-iterative learning control.
This booklet provides readers with a comprehensive coverage of iterative learning control and emphasises both theoretical and practical aspects. It provides some recent developments in ILC convergence and robustness analysis as well as issues in the ILC design.
Get more details here.
Buy the book!
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Other - submit!
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Bob (Branch & bound optimization library) - Betrand LeCun
BOB is a library for an easy development of the Branch-and-Bound applications.
This library has the double goal of allowing on the one hand the Combinatorial Optimization community to implement their applications without worrying about the architecture of the machines and benefiting the advantages provided by parallelism. On the other hand, BOB offers to the community of Parallelism a set of benchmark composed by the efficient algorithms of Combinatorial Optimization for its parallelization methods and/or tools.
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FAP web - Andreas Eisenblätter and Arie Koster
A website devoted to Frequency Assignment
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