Studies of Design and Assembly Defects on Integrated and Modular Architectures

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Keyword: Engineering and Technology, Mechanical Engineering, Production Engineering, Human Work Science and Ergonomics, Teknik och teknologier, Maskinteknik, Produktionsteknik, arbetsvetenskap och ergonomi, Defect statistics, Product architectures, Product verifications, Stålformning och ytteknik
Publication year: 2005
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SDG 3 Good health and wellbeingSDG 9 Industry, innovation and infrastructureSDG 15 Life on land
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It is known that despite companies’ efforts to improve the quality of their products, design and assembly defects results in large repair costs both in terms of repair and providing feedback to the origin of the defect. The purpose of this paper is to study these types of defects and the defect rates in design and assembly. The paper presents a web based questionnaire answered by 29 companies. The result shows that the defect rate (defects per product) spanned from 0.01 to 10. Also, design and assembly defects covered 46%, 23% respectively, of all occurred defects. A case study is also presented, performed at a company who recently implemented a modular architecture. In this company, defects from 5 700 integrated product architectures are compared with defects from 431 modular architectures. The average defect rate increased by 21.5% – from 0.65 to 0.79 – when a more modular architecture has been implemented. Furthermore, the study showed that the assembly defects have decreased while the design defects increased. The results presented in this paper will also support the development of the MPV (Module Property Verification) method which is briefly described.


Patrick Kenger

Högskolan Dalarna; Maskinteknik
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Gunnar Erixon

Högskolan Dalarna; Maskinteknik
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