Abstract
When designing a new system, engineers must often select from a set of discrete technologies available for use. Once the engineers select these technologies, they subsequently determine the value of continuous variables (e.g., lengths, thicknesses, other dimensions) that describe the new system. This mix of discrete and continuous choices can make it difficult to identify the best design. Additional difficulties arise when—as for most new systems—a trade-off exists between multiple, competing objectives. From a design optimization perspective, the resulting problem is a Multi-Objective, Mixed-Discrete Non-Linear Programming (MO-MDNLP) problem. The solution to an MO-MDNLP problem is not a single design; it is a set of non-dominated designs. In this set, the performance of one objective cannot improve without degrading performance in the other objective(s). However, the design process requires that a single design emerge as the best candidate; this best design needs to reflect the decision-maker’s preferences. The Surrogate Worth Trade-off (SWT) method is one approach that provides an interface between the decision-maker’s preferences and the mathematical models. This paper applied the SWT method to a simple example MO-MDNLP problem to determine how this might support a decision-maker in selecting new technologies during the early phases of design.
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Acknowledgments
The authors would like to express deep appreciation to the CESUN organizing committee. The support from Japan Student Services Organization is gratefully acknowledged.
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Iwasawa, A., Kohtake, N., Minato, N., Crossley, W. (2014). Investigating the Surrogate Worth Trade-off Method to Facilitate Technology Selection for New Systems. In: Gheorghe, A., Masera, M., Katina, P. (eds) Infranomics. Topics in Safety, Risk, Reliability and Quality, vol 24. Springer, Cham. https://doi.org/10.1007/978-3-319-02493-6_21
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DOI: https://doi.org/10.1007/978-3-319-02493-6_21
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