Design Engineering Laboratory

Strasbourg, France

Design Engineering Laboratory

Strasbourg, France

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Houssin R.,University of Strasbourg | Renaud J.,Design Engineering Laboratory | Coulibaly A.,Design Engineering Laboratory | Cavallucci D.,Design Engineering Laboratory | Rousselot F.,Design Engineering Laboratory
International Journal on Interactive Design and Manufacturing | Year: 2015

A few years after TRIZ appearance in highly industrialized countries, many experts in Case Based Reasoning pointed out potential similarities between both approaches. Later on, research activities have been conducted and publications appeared on this subject. This paper presents the results of an in depth study of the roots of both approaches, from the point of view of their philosophy and the scope of their relevant action. After several tests and investigations, we arrived to the point that each approach weakens the other if any of the two let the other govern its conduction. The paper discusses this claim and provides some potential directions for new research in this area. © 2014, Springer-Verlag France.


Dubois S.,Design Engineering laboratory | Lin L.,Design Engineering laboratory | De Guio R.,Design Engineering laboratory | Rasovska I.,University of Strasbourg
Proceedings of the International Conference on Engineering Design, ICED | Year: 2015

In this article, the authors will present a general approach to build a continuum between optimization and dialectic based invention (problem solving) methods. The building of this continuum is mainly based on the consideration of the Pareto-frontier as a link between both approaches. The authors considered TRIZ contradiction models as the entry point of the inventive methods. As this Pareto-frontier is recognized as the limits of the optimal solutions for the optimization approaches, a link between this frontier and the contradiction model is described in this article. Then the general approach is described, and illustrated through the resolution of a supply chain problem.


Hussain A.,Asian Institute of Technology | Abbasi A.R.,Design Engineering Laboratory | Afzulpurkar N.,Asian Institute of Technology
Human-centric Computing and Information Sciences | Year: 2012

Background: In this paper, we report on development of a non-intrusive student mental state prediction system from his (her) unintentional hand-touch-head (face) movements. Methods: Hand-touch-head (face) movement is a typical case of occlusion of otherwise easily detectable image features due to similar skin color and texture, however, in our proposed scheme, i.e., the Sobel-operated local binary pattern (SLBP) method using force field features. We code six different gestures of more than 100 human subjects, and use these codes as manual input to a three-layered Bayesian network (BN). The first layer holds mental state to gesture relationships obtained in an earlier study while the second layer embeds gesture and SLBP generated binary codes. Results: We find it very successful in separating hand (s) from face region in varying illuminating conditions. The proposed scheme when evaluated on a novel data set is found promising resulting with an accuracy of about 85%. Conclusion: The framework will be utilized for developing intelligent tutoring system. © 2012, Hussain et al.; licensee Springer.


Lin L.,Design Engineering Laboratory | De Guio R.,Design Engineering Laboratory | Dubois S.,Design Engineering Laboratory | Rasovska I.,CNRS Computer Science and Engineering Laboratory
Proceedings of the 2014 International Conference on Innovative Design and Manufacturing, ICIDM 2014 | Year: 2014

Problem solving in design is one of the main studied topic of research, and especially methods for problem solving. Generally, two kinds of methods are differentiated, those dedicated to routine design, and those focused on inventive design. The authors aim at linking the two approaches and building a continuum between both. Thus they studied the link and direct extraction of contradictions out of experiments. To do so they built a generic model of contradictions, the Generalized System of Contradictions (GSC). This paper proposes an algorithm for identifying and extracting generalized physical contradictions, a part of the GSC, from experiments. First, the authors' design methodology to build the continuum from optimization till invention is introduced. The notion of Generalized System of Contradictions is presented and the focus is made on the notion of Generalized Physical Contradiction. This one is described through Binary Integer Programming and an algorithm is proposed in order to identify and extract complete set of Generalized Technical Contradictions (GTCs) from experiments concerning the inventive problem. © 2014 IEEE.


Cavallucci D.,Design Engineering Laboratory | Fuhlhaber S.,Time To Innovate | Riwan A.,CEA Saclay Nuclear Research Center
Procedia Engineering | Year: 2015

Adopting relevant decisions in engineering design of multidisciplinary problematic is often perceived as a critical issue in industry. This situation becomes even more critical when in inventive design context since decisions lead R&D teams towards unusual directions that, by nature, expose the company to risky investments. IDM-TRIZ is an advanced framework proposed to address the issue of representing multidisciplinary and complex situations to facilitate TRIZ use in inventive design projects. One of its tool "problem graph" has been designed to link expert knowledge representations and automatic extraction of populations of contradictions. This first step nevertheless presents a limitation; it doesn't help project leaders to properly estimate the incidences of their decisions when engaging inventive activities to solve a specific problem. This paper addresses this issue and proposes an enhanced methodological process that is handling dynamic multiple graphical representations based on computed project data's exploitation. It provides relevant proofs that, in comparison with a traditional TRIZ approach, we have significantly improved the robustness of R&D decisions. In addition, we illustrate our methodology using a case study conducted in airspace industry (helicopter assembly complexity) to present and validate our hypothesis. © 2015 The Authors. Published by Elsevier Ltd.


Taheri A.,Design Engineering Laboratory | Cavallucci D.,Design Engineering Laboratory | Oget D.,Design Engineering Laboratory
ICDC 2012 - 2nd International Conference on Design Creativity, Proceedings | Year: 2012

This paper represents partial results of our research among different design theories to make a data base of the theories components, discern inventive design activities and define an indicator for inventive design efficiency. Components that have been found and listed in this paper are in association with three approaches as C-K theory, FBS framework and TRIZ theory. Despite these three approaches have totally different structures and have been defined for different missions and applications, but comparatively against the others trace the evolution of concept during design acts and try to reformulate the originality degree of new product. This last steer us proposing a new inventiveness metric model as a combinative preliminary inventiveness assessment which is based on the three mentioned design approaches. This integrated inventiveness assessment model is represented in third section.


Rousselot F.,Design Engineering Laboratory | Renaud J.,Design Engineering Laboratory
Procedia Engineering | Year: 2015

A few years after TRIZ appearance in highly industrialized countries, many experts in Case Based Reasoning pointed out potential similarities between both approaches. Later on, research activities have been conducted and publications appeared on this subject. This paper presents the results of an in depth study of the roots of both approaches, from the point of view of their philosophy and the scope of their relevant action. After several tests and investigations, we arrived to the point that each approach weakens the other if any of the two let the other govern its conduction. The paper discusses this claim and provides some potential directions for new research in this area. © 2015 The Authors. Published by Elsevier Ltd.


Taheri A.,Design Engineering Laboratory | Cavallucci D.,Design Engineering Laboratory | Oget D.,Design Engineering Laboratory
Procedia Engineering | Year: 2015

Measuring the efficiency of inventive design is the first research step to determine the key indicators of inventive efficiency. Detecting measurement objects, parameters, and the impacts factors that involve with inventive design processes provides us toward founding an effective measurement. The article looks for the appropriate zone across organizational processes for measuring inventive efficiency and mapping criteria. It aims to clear the principal criteria of measuring inventive efficiency, and demonstrates the necessity of a pertinent selection for entry factors to define indicators. This research is fed by an inquiry of about 100 French companies with their R&Ds. © 2015 The Authors. Published by Elsevier Ltd.

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