Showing papers in "European Journal of Operational Research in 1992"

TL;DR: In this paper, some of the main known results relative to the Vehicle Routing Problem are surveyed.

TL;DR: Some of the main known algorithms for the traveling salesman problem are surveyed and the definition and applications of these algorithms are explained.

TL;DR: In this paper, a partition of the optimal frontier into three parts corresponding to increasing, constant, and decreasing returns to scale is proposed, characterized in terms of optimal primal solutions and optimal dual solutions for both the original Charnes, Cooper, Rhodes model (1978) and the later Banker-Charnes-Cooper model (1984) and relying on concepts developed by R.D. Banker and R.M. Thrall.

TL;DR: In this paper, a case study focused on improving quality and total cost performance in the insurance industry is presented to illustrate how these tools can both produce insight and focus change, and that simulation is an important element of successful learning laboratories to develop systems thinking and promote organizational learning.

TL;DR: A survey of branch-and-bound algorithms for the problem of finding the minimum cost assignment of jobs to agents as discussed by the authors shows that most approaches seem to be based on branch and bound with bound supplied through heuristics and through relaxations of the primal problem formulation.

TL;DR: This work states that rich stores of information about governing policies and economic structure are available from mental data bases built up from experience and observation, and all kinds of information should be used, not merely numerical data.

TL;DR: The paper illustrates the practical usefulness of the models developed and highlights the alternative measures of relative efficiency implicit in the modelsDeveloping models which can be used to estimate alternative input-output target levels to render relatively inefficient organisational units efficient.

TL;DR: A new procedure for scheduling projects where the availability of resources is constrained is presented, which outperforms the chosen heuristic rules, and also demonstrates that it can generate near-optimal schedules.

TL;DR: This paper identifies and discusses the most important elements of its decision making environment and contributes to the structuring of the maintenance management area and provides a frame of reference for further research in maintenance policy optimization.

TL;DR: This paper focuses on classifying multiple criteria decision making problems, and discussing how decision makers can be assisted (supported) in structuring and solving such problems.

TL;DR: The development of an instrument for measuring and analyzing manufacturing flexibility was reported, using a survey of 269 firms and employing factor-analytic techniques, and the instrument contained 21 items representing nine components of manufacturing flexibility.

TL;DR: In this article, a taxonomy for product warranty policies is presented to assist the manager responsible for a product warranty in choosing appropriate alternatives for evaluation before a final choice is made, and the taxonomy can be used to compare different types of warranty policies.

TL;DR: In this paper, a coding scheme designed for facility layout is presented, where a solution is represented by the postorder sequence of the nodes in a slicing tree, and new solutions are generated by applying the various genetic operators in each generation.

TL;DR: The paper explains how the modelling process fits into conventional management team meetings, and then contrasts the value chain methodology and system dynamics in order to illustrate the variety of group and cognitive support provided by different maps and frameworks.

TL;DR: The robustness approach to the layout decision making can be applied to single and multiple period problems in the presence of considerable uncertainty, both in terms of products to be produced as well as their production volumes.

TL;DR: The hybrid simulated annealing (HSA) algorithm as discussed by the authors uses the modified penalty algorithm to generate an initial solution and then improves it using simulated anealing, which is tested on single-row layout problems with facilities of unequal area.

TL;DR: A classification scheme that categorizes the literature on APP since early 1950 is presented, summarizing the various existing techniques into a framework depending upon their ability to either produce an exact optimal or near-optimal solution.

TL;DR: Computer simulation is used to compare two new procedures for batching orders in an order retrieval system against a baseline procedure, and results indicate that theTwo new procedures, in combination with skewed (ABC) item location assignments can reduce batch tour lengths by up to 44%.

TL;DR: In this paper, a deterministic inventory model for deteriorating items with two warehouses is developed when the replenishment rate is finite, demand is at a uniform rate, and shortages are allowed.

TL;DR: A variety of mathematical models have been developed to study different aspects of the warranty as discussed by the authors, and a comprehensive review of these models is carried out by classifying them into three categories based on consumer, manufacturer and public policy decision maker perspectives.

TL;DR: The existing literature on mapping and eliciting knowledge for system dynamics modeling is surveyed and the literature in the broader fields of cognitive psychology and small group processes is explored.

TL;DR: It is argued that a learning experience was necessary before arriving at the new methodology but that it is now a valuable and significant component of the division's work.

TL;DR: These enhancements relate to the use of a Langrangean heuristic, feasible solution exclusion constraints, Gomory f-cuts and an improved branching strategy that gives better computational results than the original algorithm.

TL;DR: Throughput capacity models are comprised of picking policies, batching policies, storage assignment policies, as well as dynamic control models, which find the optimal warehouse size or else maximize space utilization.

TL;DR: In this article, nonlinear programming (NLP) techniques are developed that minimize the material handling cost of a facility layout problem, and the heuristics developed are shown to produce solutions comparable to, and in many cases better than, those of other algorithms.

TL;DR: This paper approaches the problem by collecting empirical data and applying factor analysis in an attempt to measure three dimensions of flexibility: mix, new product, and modification.

TL;DR: This paper describes and model in general terms the composite design and operating problems for a typical order-consolidation warehouse and describes the application of a new multi-stage hierarchical decision approach to an automotive spare-parts distribution centre.

TL;DR: Though Vensim was not originally intended as a teaching tool, it has proved to be fun and useful for novices and development is now underway to support implementation as a learning environment.