This book originates from a workshop organised by ESPRIT project 20 477, ARES in Las Palmas de Gran Canaria, Spain, February 1998. ARES is an acronym for Architectural Reasoning for Embedded Systems. Within this project we investigate techniques to deal with problems of software architecture of families of embedded systems. It is the second workshop organised by this project. Its predecessor was held in Las Navas de Marques, Spain, November 1996. The proceedings of the first workshop are only available in electronic format at "http://www.dit.upm.es/~ares/". The second workshop succeeded, even more than the first one, in gathering many of the most prominent people working in the area of software architecture for product families or product lines. This second workshop consisted of six sessions. The first session was meant to report the ARES results, according to the topics of the next five sessions. The remaining sessions dealt with different aspects of software architecture, focussed on applications for product families or product lines. Because there will be a separate book covering all ARES results, the first session is not included in this book. The workshop was chaired by Henk Obbink from Philips Research and Paul Clements from the Software Engineering Institute at Carnegie Mellon University. They prepared and presented an overall conclusion at the end of the workshop. This conclusion was used in the introduction to this book.

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Table of Contents Introduction H. Obbink, P. Clements, F. van der Linden Example Architectures Session 1: Example Architectures W. Scherlis, J. Kuusela Reusable Framework for Telecontrol Protocols G. Cysewski, T. Gromadzki, H. Lyskawa, M. Piechowka, S. Szejko, W.E. Kozlowski, O. Vahamaki A Software Bus as a Platform for a Family of Distributed Embedded System Products E. Niemelae, H. Perunka, T. Korpipaeae A Three-Tier Design Approach for a Family of Large AC Drive Control Systems P. Kolb, B. Huber Modular Turbine Control Software: A Software Architecture for the ABB Gas Turbine Family Control System Evolution of an Object-Oriented Framework in an Industrial Setting A. Rösel Architectural Description Session 2: Architectural Description D. Perry, J. Kramer Generic Architecture Descriptions for Product Lines D. Perry A Model of Interaction in Concurrent and Distributed Systems N. Pryce, S. Crane An Integral Hierarchy and Diversity Model for Describing Product Family Architecture P. van de Hamer, F.J. van der Linden, A. Saunders, H. te Sligte Koala, a Component Model for Consumer Electronics Product Software R. van Ommering Architecture Recovery Session 3: Architecture Recovery J.-M.DeBaud, M. Jazayeri Recovery of Architectural Structure: A Case Study H. Gall Reengineering C/C++ source Code by Transforming State Machines R. Knor, G. Trausmuth, J. Weidl An experiment in Distributed Software Architecture Recovery N. Mendona, J. Kramer Reverse Engineering to recover and describe a systems architecture B. Bellay, H. Gall Can Legacy Systems Beget Product Lines N. Weiderman, J. Bergey, D. Smith, S. Tilley The Relation Between the Product Line Development Entry Points and Reengineering J.-M. DeBaud, J.-F. Girard Analysis of Software Architectures Session 4: Analysis of Software Architectures P.C. Clements, J.A. de la Puente Diagnostic Software Architectures R.T. Bechtold Software Architecture Evaluation Model J.C. Duenas, W.L. de Oliveira, J.A. de la Puente An ArchitecturalInfrastructure for Product Families R. Balzer Assessment of Timing Properties of Family Products A. Alonso, M. Garca-Valls, J.A. de la Puente Development Process Session 5: Development Process D.M. Weiss, F.J. van der Linden Stakeholders in Software-system Family Architectures T. Dolan, R. Weteringg, J.C. Wortmann Handling Variant Requirements in Software Architectures for Product Families C.C. Yu, A.L. Ananda, S. Jarzabek Architecture-Centric Software Development Based on Extended Design Spaces L. Baum, L. Geyer, G. Molter, S. Rothkugel, P. Sturm Architecting for Domain Variability J. Meekel, T.B. Horton, C. Mellone Commonality Analysis: A Systematic Process for Defining Families D.M. Weiss Structuring Design Decissions for Evolution A. Karhinen, J. Kuusela Structural views, Structural Evolution, and Product Families W.L. Scherlis Product Family and Reuse in Separate Market Driven Profit Centers J. Brouwer, A. Jurriens, H. van Kessel, A. Schippers ERW7 Session Report: Reuse Adoption Experiences Across a Large Corporation S. Bandinelli