Research on development and maintenance of software product lines

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In order to improve productivity of software development, to improve stability of quality and to shorten the lead time of software development, product line development of software is attention whose target is a product family in the same domain. The software product line development is a method of large-scale reusing software components systematically. The purpose of this research was to develop a qualified software product lines by the given methodology, and to utilize it. In particular, our research target is optimal representation method of core assets, establishment of a clear scoping technique, and selection method of core asset. For these purposes, we pointed out some problems, presented countermeasures, and verify its effectiveness. In addition, we suggested a new maintenance method of core asset was proposed. It will be possible that the application of the product line in this research makes the application developments easy for high reliability with high productivity.