Costing Tools for Decision Making within Integrated Aerospace Design

Curran, Richard; Kundu, Ajoy Kumar; Raghunathan, Srinivasan; Eakin, D.E.

doi:10.1177/1063293x0100900408

Cited by 31 publications

(10 citation statements)

References 15 publications

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“…There are a number of alternative cost modelling methods (5)(6)(7) with which one can arrive at a cost estimate associated with any given pursuit. Bottom-up or Detailed Estimating (DE) is the least formulated costing technique and entails the gathering of all cost information that can be directly attributed to the final article, to be cumulated into a highly detailed model.…”

Section: Cost Modellingmentioning

confidence: 99%

Aircraft cost modelling using the genetic causal technique within a systems engineering approach

Curran¹,

Castagne²,

Early³

et al. 2007

Aeronaut. j.

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the airframe sub-system. The systems costing methodology is facilitated by the genetic causal cost modeling technique as the latter is highly generic, interdisciplinary, flexible, multilevel and recursive in nature, and can be applied at the various analysis levels required of systems engineering. Therefore, the main contribution of paper is a methodology for applying systems engineering costing, supported by the genetic causal cost modeling approach, whether at a requirements, functional or physical level.

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Section: Cost Modellingmentioning

confidence: 99%

Aircraft cost modelling using the genetic causal technique within a systems engineering approach

Curran¹,

Castagne²,

Early³

et al. 2007

Aeronaut. j.

Self Cite

View full text Add to dashboard Cite

show abstract

“…University Belfast (18)(19)(20)(21) and is fundamentally based on the Genetic-Causal cost modelling philosophy. The approach imposes a genetic grouping philosophy that requires families of process and part type to be identified, so that causal links can be identified for the parameters that are to be related to cost for each of the identified families.…”

Section: Calibration and Verification Of The Modelmentioning

confidence: 99%

Integration of friction stir welding into a multi-disciplinary aerospace design framework

Laan¹,

Curran²,

Tooren³

et al. 2006

Aeronaut. j.

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NOMENCLATURECER cost estimating relation DEE design and engineering engine FSW friction stir welding KBE knowledge based engineering t delay delay time before a manufacturing operation τ 0 time it takes to reach 63% of the steady state speed of a manufacturing process ν 0 steady state speed of a manufacturing process x variable on which manufacturing analysis are based, for instance length or area INTRODUCTIONTo remain competitive in a rapidly changing and customer driven industry manufacturers are implementing integrated and collaborative design methodologies and are looking for cost effective manufacturing methods. The integrated and collaborative design methodologies are generally addressed as concurrent engineering. Manufacturers are realising that knowledge is the intellectual capital of the enterprise and as such are embracing a philosophy known as knowledge based engineering (KBE) to enable and facilitate concurrent engineering. Cost effective and efficient manufacturing methods are usually methods that can be automated and which produce reliable and appropriate results. For joining different metallic parts, friction stir welding (FSW) fits these ABSTRACT Multidisciplinary design and innovative highly automated manufacturing methods are increasingly important to today's aircraft industry: multidisciplinary design because it reduces lead-time and results in a better design, and automated manufacturing methods because they are more capable and reduce manufacturing cost. In this paper a cost estimation model is presented that integrates the manufacturing cost of friction stir welded connections within a multidisciplinary design decision tool. Due to the fact that friction stir welding is a new manufacturing method, the cost estimation model is based on the actual process physics, meaning what the process looks like in terms of processing speeds and characteristics. As an integral part of a multidisciplinary design framework, the developed cost estimation model contributes to a design support tool that assesses not only manufacturing but also structural and aerodynamic issues. It is shown that the cost model developed can be integrated into this more holistic design process support architecture. The predicted costs are accurate to the historical data and allow tradeoff of manufacturing and economic considerations within the context of the multidisciplinary design tool. The tradeoff capability is highlighted through a presented case study that compares the friction stir welding process as an alternative solution to more tradition riveting. Most importantly, this results in a quantitative tradeoff between two processes that shows the manufacturing cycle time of friction stir welding to be reduced by 60% and the recurring assembly cost by 20%.

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“…The findings from this programme led to the just completed EPSRC funded programme DEMARDOC where the concept was extended to trade-off studies between wider ranges of design drivers; including aerodynamics, structural configuration, manufacturing and assembly. Details of these investigations are given in refrences (105)(106)(107)(108)(109)(110)(111) .…”

Section: Nacelle Pylon and Wing Aerodynamic Integration (92-102)mentioning

confidence: 99%

“…COST (104)(105)(106)(107)(108)(109)(110)(111) In recent years, customer needs in the commercial Aerospace sector have been governed by reduced lead-time and cost, while also looking for enhanced aircraft performance and safety measures (104,105) . this methodology several aspects of manufacturing and assembly were taken into consideration.…”

Section: Aerodynamic Design Trade-off Model For Manufacturing Andmentioning

confidence: 99%