Conference article

System-Level Design Trade Studies by Multi Objective Decision Analysis (MODA) utilizing Modelica

Joshua Sutherland
Department of System Innovation, The University of Tokyo, Japan

Kazuya Oizumi
Department of System Innovation, The University of Tokyo, Japan

Kazuhiro Aoyama
Department of System Innovation, The University of Tokyo, Japan

Naoki Takahashi
Dassault Systèmes K.K., Tokyo, Japan

Takao Eguchi
Shinko Research Co. Ltd, Tokyo, Japan

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Published in: The First Japanese Modelica Conferences, May 23-24, Tokyo, Japan

Linköping Electronic Conference Proceedings 124:9, p. 61-69

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Published: 2016-05-18

ISBN: 978-91-7685-749-6

ISSN: 1650-3686 (print), 1650-3740 (online)


This paper describes an approach and tool to conduct System-Level Design Trades Studies utilizing Modelica by way of Multi Objective Decision Analysis (MODA). Requirements for this being identified from the problems experienced on student Solar-Boat project. The proposed approach and tool utilizes Modelica to predict performance of different competing alternative designs and MODA as a way to consistently compare those alternatives subject to a range of Assessment Scenarios. To enable alternative designs to be created with low effort the replaceable feature of Modelica components is used such that the alternatives can share common architectures subject to a defined hierarchy which includes the Assessment Scenario itself. A tool was created to automate the placement of alternative designs into the Assessment Scenarios, run the simulations and consolidate the results via MODA. Examples utilizing the approach and tool to predict performance of competing Solar-Boat designs and compare them is provided.


Trade Studies, Assessing Alternative Designs, System-Level Design


Cilli, M. V., & Parnell, G. S. (2014). Systems engineering tradeoff study process framework. In 24th INCOSE Int’l Symposium, Las Vegas, NV.

DyMat 0.7 (2015), A package for reading and processing the result files of Dymola and OpenModelica.

Edwards, S., Cilli, M. V., Peterson, T., Zabat, M., Lawton, C.,& Shelton, L. (2015). Whole Systems Trade Analysis. In 25th INCOSE Int’l Symposium, Seattle. Seattle, WA, USA.

INCOSE. (2015). Wiley: INCOSE Systems Engineering Handbook: A Guide for System Life Cycle Processes and Activities, 4th Edition - INCOSE.

ISO. (2015). Automation systems and integration --Object- Process Methodology (No. ISO/PAS 19450:2015).

Parnell, G. S., Cilli, M. V., & Buede, D. (2014). Tradeoff Study Cascading Mistakes of Omission and Commission. INCOSE International Symposium, Las Vagas.

EBoK. (2015). Guide to the Systems Engineering Body of Knowledge (SEBoK).

Sutherland, J., Kamiyama, H., Aoyama, K., & Oizumi, K. (2015). Systems Engineering and the V-Model: Lessons from an Autonomous Solar Powered Hydrofoil. Presented at the 12th International Marine Design Conference (IMDC), Tokyo Japan.

Sutherland, J. (2016, March 4). Knowledge Management and System-Level Design Tools utilizing OPM and Modelica for a Student Solar-Boat Project (Master’s Thesis). University of Tokyo, Tokyo Japan.

Ulrich, K., & Eppinger, S. (2011). Product Design and Development (5 edition). New York: McGraw-Hill/Irwin.

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