Use this URL to cite or link to this record in EThOS:
Title: An investigation into surplus value and its implications in aircraft design
Author: Mullan, Claudia
Awarding Body: Queen's University Belfast
Current Institution: Queen's University Belfast
Date of Award: 2015
Availability of Full Text:
Full text unavailable from EThOS.
Please contact the current institution’s library for further details.
The research presented in this thesis takes surplus value as a global objective function and examines how it can be used to identify key sensitivities and design drivers to guide designers in trade off decisions. The methods and tools developed throughout this research can improve aircraft design practices as they encourage those involved to analyse how business and stakeholder factors as well as design changes affect the value and therefore viability of the proposed product whilst analysing it from a whole life perspective. Key conclusions include the expansion and subsequent disaggregation of the surplus value function to account for all lifecycle phases allowing designers to predict essential information such as the product's optimum lifespan and manufacturing profile. This led to the development of Value Influence Coefficients which provided a way for designers to rapidly assess multiple design drivers and conflicting requirements providing justification for their design decisions. Finally, subsystem integration was analysed from a value viewpoint through the development of a subsystem interaction tool which provided a method to assess whether the inherent dependencies which exist between subsystems within a complex system affect design choices and should be included in the decision process or whether their effects are negligible and can be neglected. In summary, the foundations for understanding the value of engineering decisions on both a global and subsystem level have been demonstrated in this work and surplus value has been shown to have much potential for use in both VDD and the aircraft design process.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available