Abstract
In concept design, effective decision making and management of schemes can shorten the design cycle and improve product quality. The decision maker (DM)’s confidence is one of the critical factors affecting the conceptual design evaluation. Although many studies use quantitative linguistic evaluation for design scheme decision-making, which improves product conceptual design decision-making efficiency and effectiveness, few studies consider the confidence level of a decision. A conceptual design evaluation method based on Z-numbers is proposed to solve this problem, considering the customer requirements and the DM’s confidence. Firstly, the evaluation criteria are determined by analyzing customer requirements; then, the fuzzy analytic hierarchy process in the Z-numbers environment (Z-AHP) is used to determine the criteria weight; Finally, the fuzzy technique for order preference by similarity to ideal solution method in the Z-numbers environment (Z-TOPSIS) is used to evaluate the design schemes to obtain the optimal scheme. The proposed method is applied to the selection of the design scheme of the waste containers in the kitchen. The results show that considering the DM’s self-confidence can achieve a more reasonable and practical evaluation of the conceptual design scheme, and it is easier to obtain the best scheme.
Highlights
IntroductionPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
The concept design evaluation method considering self-confidence is applied to an innovative design task, and its feasibility is analyzed and compared with the existing methods
Given the subjectivity and uncertainty in conceptual design evaluation, this paper proposes an evaluation method of different decision maker (DM) using different evaluation confidence scales, which makes up for the deficiency of quantitative information reliability when using the fuzzy method
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. With the continuous improvement of living standards and industrialization levels, people put forward higher and higher requirements for product diversification, personalization, and upgrading, making the product cycle shorter and shorter and leading to more and more fierce market competition. The product that meets the customer’s requirements can make the enterprise win the market competition. In the new product development stage, the decision in the conceptual design is significant, and it impacts all subsequent stages and the cost, quality, and performance of the final product [1]
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