Papers by Moshe Eben Chaime
IV International Symposium on Applications of Modelling as an Innovative Technology in the Agri-Food-Chain: Model-IT, 2008
International Journal of Production Economics, Aug 1, 1997
Most operations management studies of automatic warehousing systems investigate single-machine sy... more Most operations management studies of automatic warehousing systems investigate single-machine systems in isolation of the total system which includes other related functions. In this paper, we overcome these limitations and investigate an integrative model of a warehouse, ...
Proceedings of the International Conference on Industrial Engineering and Operations Management
Journal of Manufacturing Systems, 2015
Total Quality Management & Business Excellence, 2013
Water Research, 2013
Sea water desalination provides fresh water that typically lacks minerals essential to human heal... more Sea water desalination provides fresh water that typically lacks minerals essential to human health and to agricultural productivity. Thus the rising proportion of desalinated sea water consumed by both the domestic and agricultural sectors constitutes a public health risk. Research on low-magnesium water irrigation showed that crops developed magnesium deficiency symptoms that could lead to plant death, and tomato yields were reduced by 10-15%. The World Health Organization (WHO) reported on a relationship between sudden cardiac death rates and magnesium intake deficits. An optimization model, developed and tested to provide recommendations for Water Distribution System (WDS) quality control in terms of meeting optimal water quality requirements, was run in computational experiments based on an actual regional WDS. The expected magnesium deficit due to the operation of a large Sea Water Desalination Plant (SWDP) was simulated, and an optimal operation policy, in which remineralization at the SWDP was combined with blending desalinated and natural water to achieve the required quality, was generated. The effects of remineralization costs and WDS physical layout on the optimal policy were examined by sensitivity analysis. As part of the sensitivity blending natural and desalinated water near the treatment plants will be feasible up to 16.2 US cents/m(3), considering all expenses. Additional chemical injection was used to meet quality criteria when blending was not feasible.
Operations Research, 1996
IFIP Advances in Information and Communication Technology, 2014
Medical decision making : an international journal of the Society for Medical Decision Making
This report demonstrates the power and usefulness of mathematical optimization as a decision supp... more This report demonstrates the power and usefulness of mathematical optimization as a decision support tool in the medical services industry by presenting an application to dialysis service planning. Models to predict the number of dialysis beds in a given region are usually population-based. Dialysis planners and providers have found a need to accommodate sparsely populated regions by making some allowance for patient travel times. A formal approach to incorporating travel times into dialysis planning, based on the formulation and solution of a mixed-integer programming model, is presented. The development of a method for dialysis planning serves as a platform to demonstrate the use of integer programming to support decision making. Major modeling principles are presented; output interpretation and sensitivity analysis are illustrated by examples; and computational requirements are discussed.
The Engineering Economist, 2000
Parametric weighing is a practical approach for project selection under risk. Only subsets of pro... more Parametric weighing is a practical approach for project selection under risk. Only subsets of projects that satisfy budget constraints are considered, in order to maximize the sum of the weighted combinations of worth values minus risk estimations, for different combinations of weights. Decision support is provided via a parametric presentation of the selected subsets and the range of parameter (weight
Production Planning & Control, 1995
This paper aims at making the queuing theory machine interference model a usable tool for process... more This paper aims at making the queuing theory machine interference model a usable tool for process designers, production managers, and others who face decisions regarding the number of machines and the size of crew to operate/maintain them. The model is presented conceptually and compared with other existing models. Next, the model is analysed, and parameter calculations are detailed: a ready-to-implement
Operations Research, 1996
In this paper, a new application of the methodology of set partitioning formulation augmented wit... more In this paper, a new application of the methodology of set partitioning formulation augmented with heuristic column generation is presented. An efficient method for the partitioning of large-scale electronic circuits is developed based on this methodology. Circuit ...
Management Science, 1996
Linear weighing is a common approach to handle multiple criteria and the "knapsa... more Linear weighing is a common approach to handle multiple criteria and the "knapsack" is a well-known combinatorial optimization problem. A knapsack problem with two linearly weighted, objective criteria is considered in this paper. For better support, it is important to provide the decision maker with information that covers the whole range of alternatives. Toward this goal, an algorithm for the
International Journal of Production Economics, 2011
This paper offers mutual exchange of knowledge and expertise between agriculture and productionec... more This paper offers mutual exchange of knowledge and expertise between agriculture and productioneconomy by economical evaluation of greenhouses. Greenhouses are Hi-Tech horticulture farms, in which advanced technological infrastructure increase production efficiency by providing optimal growing conditions. However, this infrastructure involves high capital investments. There are other cost sources, of which labor is dominant, generally in horticulture and in greenhouses in particular. Efficient use of space and labor are often conflicting goals in greenhouse layout design. In this paper, these conflicts are presented and illustrated, and tools are developed to evaluate layout design by the resultant annual operational profit, thus enable comparison of alternative layouts. To increase accessibility, spreadsheet software is used for the calculations. Further, the spreadsheet is designed to support WHAT-IF analyses. The applicability of the proposed approach is demonstrated via numerical analyses of layout design of an actual greenhouse for pepper growing using the Holland method. Evidently, the layout design can have significant effect on the economical efficiency of the greenhouse-annual profit increases by, at least 12%, and up to 40%! The tradeoff between space utilization and resource utilization; e.g., labor, is common to all greenhouses, whether vegetables, flowers or other plants are grown in them and the tools presented herein can be easily modified to any desired case.
International Journal of Production Economics, 1997
Most operations management studies of automatic warehousing systems investigate single-machine sy... more Most operations management studies of automatic warehousing systems investigate single-machine systems in isolation of the total system which includes other related functions. In this paper, we overcome these limitations and investigate an integrative model of a warehouse, ...
International Journal of Production Economics, 2008
The classic single-item, deterministic-demand, integrated vendor-buyer model is revisited. The de... more The classic single-item, deterministic-demand, integrated vendor-buyer model is revisited. The decision problem may also be viewed as that of one centralized firm, dealing with a two-level EOQ-like supply chain with finite production rates. It is sought to optimize the production lot-size and the integral number of its shipments, in equal batches, from the vendor to the buyer. While the problem calls for discrete optimization techniques, we introduced a continuous model where one can take derivatives with respect to both variables. In this short paper, we establish a 98.5% lower bound on the accuracy of this continuous model.
International Journal of Production Economics, 2003
In pull production management systems such as JIT, deliveries must be made on an as-needed basis ... more In pull production management systems such as JIT, deliveries must be made on an as-needed basis only, and production begins only when requested. It is supposed to match customer demand, i.e., producing only enough to replenish what the customer has used or sold. In this work, we argue that there should be a certain degree of independence between successive links of the supply chain, to allow flexibility in production management in individual links. We attempt to identify the degree of independence and level of flexibility in terms of lot sizing and delivery scheduling in a single-vendor-single-buyer system. Toward this aim, appropriate two-sided vendor-buyer inventoryproduction models are formulated, some interesting conclusions from their analysis are drawn, and a numerical study, which compares relevant policies, is discussed. It shows that imposing a lot-for-lot production on the JIT supplier is strikingly un-economical. On the other hand, delivery on demand can be met without intervening in the supplier's operations, and where deviation from the optimal of the resulting joint total costs is tolerable. r (I. David). 0925-5273/02/$ -see front matter r 2002 Elsevier Science B.V. All rights reserved. PII: S 0 9 2 5 -5 2 7 3 ( 0 2 ) 0 0 2 7 4 -8
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Papers by Moshe Eben Chaime