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A decision support system for the selection of a rapid prototyping process using the modified TOPSIS method

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Abstract

As a new technology that fabricates a three-dimensional (3D) physical model from computer-aided design (CAD) data using an additive process, rapid prototyping (RP) has been developed to reduce product development time and cost. Recently, many newly emerging techniques of RP have been commercialized worldwide. This paper deals with the selection of an optimal RP system that best suits the end use of a part by using multiple-attribute decision making and the test part designed with conjoint analysis to reflect users’ preference. Evaluation factors include only the major attributes that significantly affect the performance of an RP system such as accuracy, roughness, strength, elongation, part cost and build time. Crisp values such as accuracy and surface roughness are obtained with a new test part developed in this study. The part cost and build time are identified as falling within approximate ranges due to varying costs and many variable parameters. They are presented as linguistic values that can be described with triangular fuzzy numbers. Based on the evaluation values obtained, an appropriate RP process for a specific part application can be selected using a modified technique of order preference by a similarity to ideal solution (TOPIS) method given crisp data and linguistic variables as the alternatives of attributes. Finally, each attribute’s weight is assigned using a pairwise comparison matrix. Determined using these weights, the final ranking order aids in the selection of the RP system.

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Authors and Affiliations

  1. CAD/CAM Lab., Department of Mechatronics, Kwangju Institute of Science and Technology(K-JIST), 1 Oryong-dong, Puk-gu, Gwangju, 500-712, Korea

    H.S. Byun & K.H. Lee

Authors
  1. H.S. Byun
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  2. K.H. Lee
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Correspondence to K.H. Lee.

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Byun, H., Lee, K. A decision support system for the selection of a rapid prototyping process using the modified TOPSIS method. Int J Adv Manuf Technol 26, 1338–1347 (2005). https://doi.org/10.1007/s00170-004-2099-2

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  • DOI: https://doi.org/10.1007/s00170-004-2099-2

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