EVOKE: A Value-Driven Concept Selection Method for Early System Design

Article

Abstract

The development of new technologically advanced products requires the contribution from a range of skills and disciplines, which are often difficult to find within a single company or organization. Requirements establishment practices in Systems Engineering (SE), while ensuring coordination of activities and tasks across the supply network, fall short when it comes to facilitate knowledge sharing and negotiation during early system design. Empirical observations show that when system-level requirements are not available or not mature enough, engineers dealing with the development of long lead-time sub-systems tend to target local optima, rather than opening up the design space. This phenomenon causes design teams to generate solutions that do not embody the best possible configuration for the overall system. The aim of this paper is to show how methodologies for value-driven design may address this issue, facilitating early stage design iterations and the resolution of early stage design trade-offs. The paper describes how such methodologies may help gathering and dispatching relevant knowledge about the ‘design intent’ of a system to the cross-functional engineering teams, so to facilitate a more concurrent process for requirement elicitation in SE. The paper also describes EVOKE (Early Value Oriented design exploration with KnowledgE maturity), a concept selection method that allows benchmarking design options at sub-system level on the base of value-related information communicated by the system integrators. The use of EVOKE is exemplified in an industrial case study related to the design of an aero-engine component. EVOKE’s ability to raise awareness on the value contribution of early stage design concepts in the SE process has been further verified with industrial practitioners in ad-hoc design episodes.

Keywords

Requirements elicitation concept selection systems engineering value-driven design decision-making knowledge maturity 

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Notes

Acknowledgments

The research leading to these results has received financial support by: European Commission’s Seventh Framework Programme (FP7/2007-2013) through the CRESCENDO project under grant agreement n◦234344, and the Swedish Knowledge and Competence Development Foundation through the Model Driven Development and Decision Support research profile at Blekinge Institute of Technology, and the VINNOVA National Aviation Engineering Programme in Sweden, through the Virtual Turbine Module Demonstrator (VITUM) project.

The authors would also like to thank the anonymous referees for their help to improve the quality of the paper.

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Copyright information

© Systems Engineering Society of China and Springer-Verlag Berlin Heidelberg 2018

Authors and Affiliations

  • Marco Bertoni
    • 1
  • Alessandro Bertoni
    • 1
  • Ola Isaksson
    • 2
    • 3
  1. 1.Department of Mechanical EngineeringBlekinge Institute of TechnologyKarlskronaSweden
  2. 2.Department of Product and Production DevelopmentChalmers University of TechnologyGothenburgSweden
  3. 3.GKN Aerospace Sweden ABTrollhättanSweden

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