Comparison between the SPEC method and Value Analysis for an aid in preliminary design of products

Nowadays, system designers are somewhat helpless during the first stages of the design process (definition of the organic architecture during the top down stage of the « V » cycle). Indeed, they ignore if they go in a good direction (defined by the specification chart) for the different envisaged system alternatives. The SPEC method, that authors contribute to develop since several years, takes into account uncertainty inherent to this primary stage in order to propose supervision indicators (in terms of satisfactions and risks) and redesign/optimization means based upon a system/project stakeholders’ satisfaction model. For a good understanding of the interest of these design tools, we compare them with those of a conventional Value Analysis approach, for several design aid functionalities and through an industrial case study. Mots-cles :

[1]  Michael Joseph Scott,et al.  Formalizing Negotiation in Engineering Design , 1999 .

[2]  C. Jouineau,et al.  Analyse de la valeur , 2015, Conception et Production.

[3]  E. Antonsson,et al.  The Method of Imprecision Compared to Utility Theory for Design Selection Problems , 1993 .

[4]  W. Pedrycz,et al.  A fuzzy extension of Saaty's priority theory , 1983 .

[5]  Nigel Cross,et al.  Engineering design methods , 1989 .

[6]  Tao Jiang,et al.  Target Cascading in Optimal System Design , 2003, DAC 2000.

[7]  Deborah L Thurston,et al.  A formal method for subjective design evaluation with multiple attributes , 1991 .

[8]  E. Antonsson,et al.  Engineering design calculations with fuzzy parameters , 1992 .

[9]  F. A. Lootsma,et al.  Multicriteria decision analysis with fuzzy pairwise comparisons , 1989 .

[10]  Kristin L. Wood,et al.  Computations with Imprecise Parameters in Engineering Design: Background and Theory , 1989 .

[11]  E. K. Antonsson,et al.  Hierarchical imprecise design with weights , 1995, Proceedings of 1995 IEEE International Conference on Fuzzy Systems..

[12]  Bernard Yannou,et al.  LA METHODE SPEC : UNE MODELISATION DETAILLEE DU CAHIER DES CHARGES FONCTIONNEL POUR UN SUIVI DE PROJET ET UNE MAITRISE DES RISQUES , 2000 .

[13]  Brahim Rekiek,et al.  Multi-criteria decision-aid method for material handling equipment selection , 2000 .

[14]  B. Yannou,et al.  Comparaison de la méthode SPEC et de l'Analyse de la Valeur pour l'aide à la conception préliminaire de produits , 2002 .

[15]  T. L. Saaty.  A Scaling Method for Priorities in Hierarchical Structures , 1977 .