78,823 research outputs found

    A Pure Binary LP Model to the Facility Layout Problem

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    In facility layout problems, a major concern is the optimal design or remodeling of the facilities of an organization. The decision maker’s objective is to arrange the facility in an optimal way, so that the interaction among functions (i.e. machines, inventories, persons) and places (i.e. offices, work locations, depots) is efficient. A simple pure-binary LP model is developed and solved for a small hospital, where five functions are to be redesigned to five different locations. The model is rather flexible and can be used, with small modifications, for larger facility layouts.Facility layout; Binary; Linear Programming; Optimization; Efficiency

    An Optimization Method for the Remanufacturing Dynamic Facility Layout Problem with Uncertainties

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    Remanufacturing is a practice of growing importance due to increasing environmental awareness and regulations. Facility layout design, as the cornerstone of effective facility planning, is concerned about resource localization for a well-coordinated workflow that leads to lower material handling costs and reduced lead times. However, due to stochastic returns of used products/components and their uncontrollable quality conditions, the remanufacturing process exhibits a high level of uncertainty challenging the facility layout design for remanufacturing. This paper undertakes this problem and presents an optimization method for remanufacturing dynamic facility layout with variable process capacities, unequal processing cells, and intercell material handling. A dynamic multirow layout model is presented for layout optimization and a modified simulated annealing heuristic is proposed toward the determination of optimal layout schemes. The approach is demonstrated through a machine tool remanufacturing system

    Optimal Layout Design for Agricultural Facility Using Simulated Annealing

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    Rosana G. Moreira, Editor-in-Chief; Texas A&M UniversityThis is a Technical Paper from International Commission of Agricultural Engineering (CIGR, Commission Internationale du Genie Rural) E-Journal Volume 5 (2003): T. Satake, O. Sataka, Y. Ohta, and T. Furuya. Optimal Layout Design for Agricultural Facility Using Simulated Annealing. Vol. V. May 2003

    Perancangan Ulang Tata Letak pada Galangan Kapal Tradisional menggunakan Blocplan-90

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    CV. Rasya Jaya is a traditional fishing boat manufacturing company located in Padang Seurahet, Kec. Johan Pahlawan, Aceh Barat Regency. The facility layout of CV. Rasya Jaya has several workstations that are not in the correct location for the production process or the relationship between related rooms. This results in inefficient and ineffective material handling, as well as reduced worker comfort. The poorly organized facilities also contribute to production constraints. Therefore, it is necessary to evaluate the production facility layout at CV. Rasya Jaya. The goal is to provide an alternative design for the production facility layout that is more efficient and effective in terms of the relationship between the production process flow and minimizing material flow in the production process. The purpose of this study is to determine the optimal layout at CV. Rasya Jaya using the Blocplan algorithm. Blocplan-90 is an algorithm for solving spatial layout problems that can handle both quantitative and qualitative data. Mathematical models within the design are developed with computer applications for models that work with the limitations of workstation shapes. Based on the results of the layout design of facilities at CV. Rasya Jaya, three main layouts were created: office layout, facility layout, and production layout. The total area of the three layouts is 1739 m2

    A note on “An alternative multiple attribute decision making methodology for solving optimal facility layout design selection problems”

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    A paper published by Maniya and Bhatt (2011) (An alternative multiple attribute decision making methodology for solving optimal facility layout design selection problems, Computers & Industrial Engineering, 61, 542-549) proposed an alternative multiple attribute decision making method named as “Preference Selection Index (PSI) method” for selection of an optimal facility layout design. The authors had claimed that the method was logical and more appropriate and the method gives directly the optimal solution without assigning the relative importance between the facility layout design selection attributes. This note discusses the mathematical validity and the shortcomings of the PSI method

    A new approach for specifying and solving layout problems

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    International audienceComponent and facility layout plays an important role in the design and usability of many engineering products and systems as mechanical design, process plan, management and architecture including ship compartment layout. Generally, layout problems are formulated and solved on a case by case basis and, as far as we know, there is no general method to specify the similarities and characteristics of each problem. Then, this paper proposes an innovative generic approach in order to describe, formulate and solve layout problems. This approach suggests in particular a new classification of layout components, introducing the concept of "virtual" component. Moreover, in order to propose to the designer an optimal spatial arrangement in a reasonable time, this paper presents an interactive optimization strategy for solving layout problems

    Evaluation of using Swarm intelligence to produce facility layout solutions.

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    The facility layout problem is a combinatorial optimization problem that involves determining the location and shape of various departments within a facility based on inter-department volume and distance measures. An optimal solution to the problem will yield the most efficient layout based on the measures. The application of Particle Swarm Optimization (PSO) was recently proposed as an approach to solving the facility layout problem. With PSO, potential solutions are produced by dividing departments into swarms of Self-Organizing Tiles (SOT). By following a set of simple behavioral rules based on social information gathered from the environment, the tiles cooperate to produce solutions in a very short amount of time. Initial results provided improvements over CRAFT, one of the primary methods currently used for facility layout. The main contribution of this thesis work entails evaluating the use of swarm intelligence to produce optimal facility layouts as well as the use of shape measures to assess the quality of produced layouts. The major achievement of this thesis is the design and implementation of a tool that could produce facility layout solutions using Self- Organizing Tiles (SOT). This thesis advances the swarm paradigm by introducing alternative pathways for achieving contiguity of departments. This thesis utilizes the tool to examine the convergence of SOT on an enumerated optimum for a layout dataset, which requires the exhaustive evaluation of all permutations of a grid layout. The tool was also used to examine the effect of granularity on the ability of SOT to converge on facility layout solutions. A shape metric was utilized as a means of evaluating the quality of produced solutions based on the regularity of the shape of departments, and found that SOT produces fairly regular layouts when granularized to nine tiles per department. Finally, SOT was compared with other algorithms the experimental results revealed that SOT provided minor improvements over currently used methods

    An Optimization Method for the Remanufacturing Dynamic Facility Layout Problem with Uncertainties

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    Remanufacturing is a practice of growing importance due to increasing environmental awareness and regulations. Facility layout design, as the cornerstone of effective facility planning, is concerned about resource localization for a well-coordinated workflow that leads to lower material handling costs and reduced lead times. However, due to stochastic returns of used products/components and their uncontrollable quality conditions, the remanufacturing process exhibits a high level of uncertainty challenging the facility layout design for remanufacturing. This paper undertakes this problem and presents an optimization method for remanufacturing dynamic facility layout with variable process capacities, unequal processing cells, and intercell material handling. A dynamic multirow layout model is presented for layout optimization and a modified simulated annealing heuristic is proposed toward the determination of optimal layout schemes. The approach is demonstrated through a machine tool remanufacturing system

    A Multi-Factor User Interface Components Layout Problem

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    This paper presents a multi-factor layout model which combines the qualitative and quantitative factors for the facilities layout problem.  The proposed model is applied to the design of the user interface in order to obtain the best layout of the facilities in which the closeness rating scores are evaluated by using the Goals, Operators, Methods, and Selection (GOMS) technique. The results of the proposed model are compared with that of an existing model to obtain the layouts of user interface components. The model developed here has significant relevance for facility layout design in achieving an optimal interface by structuring the layout of a building to enhance and support production. The user interface model provides support for quick response to changes in customer demand and inventory planning particularly in such an area where timely transfer of information is crucial

    A Multi-Factor User Interface Components Layout Problem

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    This paper presents a multi-factor layout model which combines the qualitative and quantitative factors for the facilities layout problem.  The proposed model is applied to the design of the user interface in order to obtain the best layout of the facilities in which the closeness rating scores are evaluated by using the Goals, Operators, Methods, and Selection (GOMS) technique. The results of the proposed model are compared with that of an existing model to obtain the layouts of user interface components. The model developed here has significant relevance for facility layout design in achieving an optimal interface by structuring the layout of a building to enhance and support production. The user interface model provides support for quick response to changes in customer demand and inventory planning particularly in such an area where timely transfer of information is crucial
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