Tsuyoshi Koga

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This study proposes a methodology for predicting product failures occurring due to known failures and causalities. The prediction is based on failure propagation in an integrated model of a product, production process, and quality information (PPQ). This methodology enables a designer to predict new failures. One of the concepts for failure prediction is(More)
A product with a long-life, such as a plant or ship, must be adaptable to future technology changes, regulations, and environmental changes. This paper proposes a design method for a future scenario embedded product to enhance a product's adaptability to various changes during its lifetime. The design method derives a modular structure between platform(More)
A modular structure recommendation method and component reducing method are proposed for the product family design. The customer's requirements and the product attributes are represented as a fuzzy set and a fuzzy variable using both a point-based and a range-based approach. On the basis of the fuzzy-based representation of the product and the customer(More)
This paper proposes a representation model of the quality state change in an assembly process that can be used in a computer-aided process design system. In order to formalize the state change of the manufacturing quality in the assembly process, the functions, operations, and quality changes in the assembly process are represented as a network model that(More)
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