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According to the principles of concurrent engineering and integrated design, engineers intend to develop a mechatronic system with a high level integration (functional and physical integrations) based on a well-organised design method. As a result, two main categories of issues have been pointed out: the process-based problems and the design data-related problems. Several approaches to overcome these issues have been put forward. To solve process-based problems, a dynamic perspective is generally used to present how collaboration can be improved during the mechatronic design. For design data-related problems, solutions generally come from product models and how to structure and store the data thanks to the functionality of data and documents management of Product Lifecycle Management systems. To be able to assess design methods and product models, some criteria are proposed in the paper and used to evaluate their added value on integrated design of mechatronic system. After this assessment, main outcomes which focus on the combination of design method and product model for improving the design of mechatronic system are finally discussed.

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In order to improve the performance of extended enterprises, Small and Medium Enterprises (SMEs) must be integrated into the extended networks. This integration must be carried out on several levels which are mastered by the Product Lifecycle Management (PLM). But, PLM is underdeveloped in SMEs mainly because of the difficulties in implementing information systems. This paper aims to propose a modeling framework to facilitate the implementation of PLM systems in SMEs. Our approach proposes a generic model for the creation of processes and data models. These models are explained, based on the scope and framework of the modeling, in order to highlight the improvements provided.Keywords: PLM, Enterprise modeling, Information System. DOI: 10.3722/cadaps.2011.xxx-yyy PRODUCT LIFECYCLE MANAGEMENT NEEDS AND DIFFICULTIES IN SMALL AND MEDIUM ENTERPRISESDue to globalisation, enterprises have to work in networks which are increasingly diversified and geographically dispersed. To reach cost, quality and delay optimisation, enterprises implement new information and communication technologies. The Small and Medium Enterprises (SMEs) also try to implement those technologies but, despite their flexibility, they have difficulties in structuring and exchanging information. SMEs also have problems in creating data models for structuring and sharing product information, especially in the context of extended enterprises. This section introduces the functionalities of Produt Lifecyle Management (PLM) systems, explores the existing product models for PLM, and presents the PLM situation in SMEs. Section 2 presents a modelling framework to create models for PLM in an extended enterprise context and explains how to use the framework. Section 3 presents a demonstrator, based on the developed generic model, in order to validate the global proposal. Discussion and perspectives conclude this paper.

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Generic PLM system for SMEs: Application to an equipment manufacturer J. Le Duigou*, A. Bernard*, N. Perry**, J.C. Delplace*** *IRCCYN -UMR 6597 **I2M -UMR 5295 *** CETIM Abstract: For several years, digital engineering has increasingly taken a more important place in the strategic issues of mechanical engineering companies. Our proposition is an approach that enables technical data to be managed and used throughout the product life-cycle. This approach aims to provide assistance for costing, development and industrialization of the product, and for the capitalization, the reuse and the extension of fundamental knowledge. This approach has been experimented within several companies. This paper presents the case in a company environment that designs and produces families of ship equipment parts.

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