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The paper describes a novel framework for an Assembly-Oriented Design (AOD) approach as a new functional part of the Product Lifecycle Management (PLM) strategy, by considering product design and assembly sequence planning phases concurrently. Integration issues of product lifecycle into the product development process have received much attention over the last two decades, especially at the detailed design stage. The main objective of the research is to define assembly sequence into preliminary design stages by introducing and applying assembly process knowledge in order to provide an assembly context for the product development process, particularly for product structuring. The proposed framework highlights a novel algorithm based on a mathematical model integrating boundary conditions related to DFA rules, engineering decisions for assembly sequence and the product structure definition. This framework has been implemented in a new system called PEGASUS considered as an AOD module for a PLM system. A case study of applying the framework to a Catalytic-Converter and Diesel Particulate Filter sub-system, belonging to an exhaust system from an industrial automotive supplier, is introduced to illustrate the efficiency of the proposed AOD methodology. The work described has not been submitted elsewhere for publication, in whole or in part, and all the authors listed have approved the manuscript that is enclosed. Cover Letter *Cover LetterAn Assembly-Oriented Design Framework for Product Structure Engineering and Assembly Sequence Planning _______________________________________________________________________________________________ Abstract:The paper describes a novel framework for an Assembly-Oriented Design (AOD) approach as a new functional part of the Product Lifecycle Management (PLM) strategy, by considering product design and assembly sequence planning phases concurrently. Integration issues of product lifecycle into the product development process have received much attention over the last two decades, especially at the detailed design stage. The main objective of the research is to define assembly sequence into preliminary design stages by introducing and applying assembly process knowledge in order to provide an assembly context for the product development process, particularly for product structuring. The proposed framework highlights a novel algorithm based on a mathematical model integrating boundary conditions related to DFA rules, engineering decisions for assembly sequence and the product structure definition. This framework has been implemented in a new system called PEGASUS considered as an AOD module for a PLM system. A case study of applying the framework to a Catalytic-Converter and Diesel Particulate Filter sub-system, belonging to an exhaust system from an industrial automotive supplier, is introduced to illustrate the efficiency of the proposed AOD methodology.

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