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Design Science Journal
Papers

Estimating Cost & Improving Trade-off between Performance and Cost at the Early Design Stages

Estimating Cost & Improving Trade-off between Performance and Cost at the Early Design Stages

Year: 2009

Section: Design for X, Design to X

Editor: Norell Bergendahl, M.; Grimheden, M.; Leifer, L.; Skogstad, P.; Lindemann, U.

Author: Saravi, Mohammad; Newnes, Linda; Mileham, Tony; Goh, Yee-Mey

Section: Design for X, Design to X

Pages: 81-92

Abstract

Typically 70% to 80% of a product's cost is said to have been committed by the end of the conceptual design stage [1]. Because of the importance of the conceptual stage, cost estimation should be carried out as accurately as possible to provide valuable information to product designers. Despite this level of built in costs at the conceptual stage of design, having useful cost estimates at this stage is very difficult, due to the limited availability of data, especially for new products when product specifications are expressed as a range of values. The main aim of the research presented in this paper is to use the Taguchi method of Design of Experiments in order to use the sparse and available conceptual information more effectively to estimate the cost of a product. A review of the literature about cost estimation techniques and the available information at the conceptual stage of design is presented. A case study is also presented and used to illustrate how the Taguchi method of Design of Experiments is applied in order to assist designers at the conceptual design stage to reduce uncertainty of cost estimates and to carry out a more informed trade-off between performance and cost.

Keywords: Cost Estimation, Design Process, Concept Development, Design of Experiments

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The Design Society and the Stanford Center for Design Research cordially invite you to participate in the International Conference on Engineering Design, ICED'09. The venue will be Stanford University’s verdant campus in the heart of Silicon Valley, a short 35 miles south of San Francisco, California. Research papers and case studies are solicited on any topic related to design thinking, theory, and practice, with a premium placed on evidence-based research. Topics and Themes include: *...

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