Decentralized Optimal Design using the Lagrangian Relaxation Approach

DS 58-6: Proceedings of ICED 09, the 17th International Conference on Engineering Design, Vol. 6, Design Methods and Tools (pt. 2), Palo Alto, CA, USA, 24.-27.08.2009

Year: 2009
Editor: Norell Bergendahl, M.; Grimheden, M.; Leifer, L.; Skogstad, P.; Lindemann, U.
Author: Li, Simon
Section: Design Methods and Tools
Page(s): 313-324


To minimize the coordination efforts among design teams and expedite the design process via parallel workflow, this paper proposes a framework of decentralized optimal design. The framework consists of two major components. The first component is the characterization of team-based interactions in engineering design via the notions of responsibility and controllability. This characterization helps us to understand what kind of role a team can perform in a decentralized design environment. The second component is the application of the Lagrangian relaxation approach to support concurrent decision making (i.e., parallel workflow) during the team-based design process. The framework has been demonstrated through the welded beam design example, and the results are promising in view of future development in this research direction.

Keywords: decentralized decision making, optimal design, Lagrangian relaxation


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