TRIZ methodology adapted to hybrid powertrains

On-going oil stock depletion and growing environmental concerns lead automakers to develop more efficient powertrains. Today the most promising way forward consists in research on hybrid systems. The present study uses TRIZ methodology to help identify the best hybridization architecture and powertrain design, in order to reduce CO2 emissions. This optimization problem is constrained with cost, mass and complexity targets. It is applied to B segment hybrid electric vehicle (HEV) with no connection to the grid to recharge the battery. A specific procedure based on TRIZ principles has been established and rolled out after a first mathematical analysis of different current hybridization architectures (series, parallel and combined). The adapted TRIZ methodology is mainly built on the principles of Ideal Final Result and on networks of contradictions. It is used to compare the performances of the different architectures, identify the main technological barriers for more CO2 savings, and propose a roadmap to overcome them

Proposition de passerelles inter-méthodologiques entre la démarche d'invention TRIZ et les autres méthodes de conception.

International audienceCe papier, rédigé dans le cadre du projet de partenariat technologique "Développement de passerelles entre les méthodes de conception et la démarche d'invention TRIZ" , présente la démarche de caractérisation des liens en vue d'optimiser la cohérence des données dans un processus de conception enchainant des méthodes classiques et TRIZ. Après une brève présentation de TRIZ, et de sa potentialité à améliorer significativement le processus de conception, l'article présente la démarche de recherche des passerelles inter-méthodologiques et fait état des principaux "lieux" méthodologiques où les passerelles sont à priori envisageables entre TRIZ et les méthodes de conception courantes. Dans une quatrième partie, il est montré de façon concrète le contenu de ces passerelles et leurs apports dans une étude déroulant en parallèle les démarches d'Analyse Fonctionnelle et de TRIZ

Determination and evaluation of the possible links and sequences between TRIZ and other design methods.

International audienceTRIZ was really developed in the occident during the 90th and at the end of the 90th for Europe. Probably, the industrial development is not at the level of its potential. It sometimes uses some notions or data very close to the ones used in other methods like functional analysis or FMECA, nowadays widely implemented in the companies product development processes, and constitutes a useful complement of that methods, through its problem resolution process. Identifying and characterizing the possible links between the current methods and TRIZ could thus be an interesting way to improve the design process efficiency. Our research approach has consisted firstly in a decomposition of each method in elementary bricks. Then we analyzed these elementary bricks and according to their objectives and input and output data, we defined possible links enabling to move from a method to TRIZ and conversely. In order to remain close to industrial realities, that work also includes several case studies very useful to detect the links as well as validate them; some of the links we identified are illustrated into a technical example. That approach makes it possible to structure design process, not by a sequence of methods, but by possible sequences of elementary steps (the "bricks") coming from one or another method in order to exploit their contributions as well as possible, and according to each project specificities

The value of TRIZ and its derivatives for interdisciplinary group problem solving

The value of TRIZ for technological problem solving is widely recognized. Initially designed for an inventor working (alone) on a technical problem, it is today often used as a tool for group creativity. In this article, we report on a an experiment which was designed in order to investigate the value of concepts and tools of TRIZ and its derivatives like USIT for joint problem identification, modeling and creative problem solving in a non-technological domain by multidisciplinary teams. Further, we briefly discuss the categorization of the outcome of the creative process by a combination of TRIZ and USIT analysis tools

TRIZ methodology adapted to hybrid powertrains

On-going oil stock depletion and growing environmental concerns lead automakers to develop more efficient powertrains. Today the most promising way forward consists in research on hybrid systems. The present study uses TRIZ methodology to help identify the best hybridization architecture and powertrain design, in order to reduce CO2 emissions. This optimization problem is constrained with cost, mass and complexity targets. It is applied to B segment hybrid electric vehicle (HEV) with no connection to the grid to recharge the battery. A specific procedure based on TRIZ principles has been established and rolled out after a first mathematical analysis of different current hybridization architectures (series, parallel and combined). The adapted TRIZ methodology is mainly built on the principles of Ideal Final Result and on networks of contradictions. It is used to compare the performances of the different architectures, identify the main technological barriers for more CO2 savings, and propose a roadmap to overcome them

Construire des scénarios d'usage prospectifs dans les projets

Prospective ergonomics is concerned with the anticipation of future needs and activities to assist the early stages of user-centered innovation design projects. Few studies have proposed methodologies to assist prospective ergonomics, although this is a key to better integrating user-centered design in innovation projects. Indeed, classical methods of use analysis are of limited relevance when designers must work with ill-defined product concepts, since it may be difficult to describe future uses for these products. In this paper, we argue that some creativity methods, often used to solve technical design problems, can be used to construct speculative scenarios describing the future use of a product. We carried out simulations of design meetings, focusing on anticipating the future uses of various products. In two studies, we assessed the effects of methods borrowed from two creativity paradigms on the ability of a multidisciplinary design team to formulate prospective scenarios of future use. The first study aimed to assess the contribution of methods borrowed from the Creative Problem Solving (CPS) paradigm – brainwriting and the discovery matrix – to the production of prospective scenarios of future use. Results show that these methods allow a more structured exploration of the space of creative ideas, leading to more original ideas. In the second study, we examined the ability of a design team to use multiscreen analysis – a method borrowed from the Theory of Inventive Problem- Solving (TRIZ) – to construct a discourse on the future uses of an innovative product. Results suggest that the team was able to anticipate future evolutions of the technical artifact considered – which is the goal of the method in its classical form – but not to reappropriate this technique to imagine scenarios illustrating future uses of a product. We describe the consequences of these results for developing new methodologies for interventions in prospective ergonomics.L’ergonomie prospective est une modalité d’intervention ergonomique centrée sur l’anticipation des besoins et activités futurs, visant à assister les premières étapes du processus de conception innovante centrée utilisateurs. À ce jour, peu de propositions méthodologiques ont été formulées pour assister les interventions en ergonomie prospective, bien que ceci constitue un levier majeur pour une meilleure intégration de la conception centrée utilisateurs dans les projets d’innovation. Ainsi, les méthodes classiques de l’analyse des usages sont d’un intérêt limité lorsque le concepteur doit travailler avec des concepts de produit mal définis, car il peut s’avérer difficile de décrire les usages futurs du produit en question. Dans cet article, nous proposons que certaines méthodes de créativité, souvent utilisées pour résoudre des problèmes de nature technique dans le cadre de projets de conception, puissent être utilisées pour élaborer des scénarios spéculatifs portant sur l’usage futur d’un produit. Nous avons réalisé des simulations de réunions de conception portant sur l’anticipation des usages de différents produits et avons évalué, au travers de deux études, les effets de méthodes empruntées à deux paradigmes de créativité sur la capacité d’une équipe pluridisciplinaire de conception à formuler des scénarios d’usage futurs. La première étude visait à évaluer les apports de méthodes empruntées au paradigme du Creative Problem Solving (CPS) – le brainwriting et la matrice de découvertes – à la production de scénarios prospectifs d’usages. Elle fait suite à une étude qui montrait que ces méthodes n’avaient pas d’effet sur le nombre de scénarios produits ni sur le nombre d’idées relatives aux usagers futurs du produit ou à leurs activités. Nous montrons ici, cependant, que ces méthodes permettent de mieux structurer la dynamique d’exploration de l’espace créatif, et d’aboutir à des idées plus originales. Dans la seconde étude, nous avons examiné la capacité d’une équipe de concepteurs à exploiter l’analyse multi-écrans – une méthode empruntée à la théorie de résolution des problèmes inventifs (TRIZ) – pour construire un discours sur les usages futurs d’un produit innovant. Les résultats suggèrent que l’équipe était en mesure d’anticiper des évolutions de l’artefact technique – ce qui correspond à la finalité initiale de la méthode – mais pas de se réapproprier l’outil pour imaginer des scénarios illustrant les usages futurs possibles du produit. Nous décrivons enfin les conséquences de ces résultats pour élaborer de nouvelles méthodologies d’intervention en ergonomie prospective

TRIZ Methodology Adapted to Hybrid Powertrains Performances Evaluation

International audienceOngoing oil stock depletion and growing environmental concerns lead automakers to develop more efficient powertrains. Today the most promising way forward consists in research on hybrid systems. The present study uses TRIZ methodology to help identify the best hybridization architecture and powertrain design, in order to reduce CO2 emissions. This optimization problem is constrained with cost, mass and complexity targets. It is applied to B segment hybrid electric vehicle (HEV) with no connection to the grid to recharge the battery. A specific procedure based on TRIZ principles has been established and rolled out after a first mathematical analysis of different current hybridization architectures (series, parallel and combined). The adapted TRIZ methodology is mainly built on the principles of Ideal Final Result and on networks of contradictions. It is used to compare the performances of the different architectures, identify the main technological barriers for more CO2 savings, and propose a roadmap to overcome them

The Value of TRIZ and Its Derivatives for Interdisciplinary Problem Solving

International audienceThe value of TRIZ for technological problem solving is widely recognized. Initially designed for an inventor working (alone) on a technical problem, it is today often used as a tool for group creativity. In this article, we report on a an experiment which was designed in order to investigate the value of concepts and tools of TRIZ and its derivatives like USIT for joint problem identification, modeling and creative problem solving in a non-technological domain by multidisciplinary teams. Further, we briefly discuss the categorization of the outcome of the creative process by a combination of TRIZ and USIT analysis tools

Augmented Design with Additive Manufacturing Methodology: Tangible Object-Based Method to Enhance Creativity in Design for Additive Manufacturing

Additive manufacturing (AM) brings new design potential compared with traditional manufacturing. Nevertheless, traditional manufacturing knowledge remains embedded in the minds of designers and is a real cognitive barrier to design in AM. Design for Additive Manufacturing (DfAM) provides tools, techniques, and guidelines to optimize design with the specifics of AM. These methods are usable at different moments of the design process. Only few DfAMs focus on the early stages of design, the ideation phase, which allows for the most innovation. The literature highlights the effectiveness of methodologies based on tangible tools, such as cards or objects, to generate creativity. The difficulty with such tools is to be inspirational as well as formative. Therefore, this article presents a method to help designers capture the design potential of AM to design creative solutions at the early stages of product design, named the Augmented Design with AM Methodology (ADAM2). This methodology relies on the potential of AM, defined in 14 opportunities and a set of 14 inspirational objects, each representing an opportunity. Dedicated to creativity sessions, this methodology allows forcing the association between knowledge of a company’s sector and the design potential of AM. To validate the effectiveness of the ADAM2 methodology, we use it for an industrial application in a jewelry and watchmaking company. The results showed that ADAM2 promote the generation of creative solutions and the exploitation of the design potential of AM during the early design stages.This research was carried out as part of project CREAM (CREativity in Additive Manufacturing), funded by the National Research Agency (Project ANR-18-CE10-0010) in France