Managing assumption-driven design change via margin allocation and trade-offs

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dc.contributor.authorEl Fassi, Soufiane
dc.contributor.authorChen, Xin
dc.contributor.authorRiaz, Atif
dc.contributor.authorGuenov, Marin D.
dc.contributor.authorvan Heerden, Albert S. J.
dc.contributor.authorJimeno Altelarrea, Sergio
dc.date.accessioned2023-10-23T12:51:52Z
dc.date.available2023-10-23T12:51:52Z
dc.date.issued2023-10-11
dc.description.abstractAssumptions are commonly introduced to fill gaps in knowledge during the engineering design process. However, the uncertainty inherent in these assumptions constitutes a risk that ought to be mitigated. That is, assumptions can negatively impact the system if they turn out to be invalid. Adverse effects may include system failure, violation of requirements, or budget and schedule overruns. In this paper, the relationships between assumptions and margins are made explicit, with the purpose of aiding risk mitigation, as well as accommodating future opportunities such as product evolvability. To this end, a novel assumption management framework is proposed, which consists of a taxonomy of margins, an algorithm for change absorber localisation, and an interactive approach for margin trade-off. The proposed framework is demonstrated with a conceptual aircraft design use case, which shows that the most relevant margins can be identified, given a revision of a set of assumptions. It is also demonstrated that the application of the method allowed the margins to be adjusted according to the confidence in the assumptions, while maintaining satisfaction of all design constraints, without unacceptable compromise of system performance.en_UK
dc.identifier.citationEl Fassi S, Chen X, Riaz A, et al., (2023) Managing assumption-driven design change via margin allocation and trade-offs. Journal of Engineering Design, Available online 11 October 2023en_UK
dc.identifier.issn0954-4828
dc.identifier.urihttps://doi.org/10.1080/09544828.2023.2259741
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/20428
dc.language.isoenen_UK
dc.publisherTaylor and Francisen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectmargin trade-offen_UK
dc.subjectassumption managementen_UK
dc.subjectset-based designen_UK
dc.subjectaerospace engineeringen_UK
dc.titleManaging assumption-driven design change via margin allocation and trade-offsen_UK
dc.typeArticleen_UK

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