Research on development and maintenance of software product lines

为了提高软件开发的生产率，提高质量的稳定性，缩短软件开发的周期，软件的产品线开发受到关注，其目标是同一领域内的一个产品族。软件产品线开发是一种大规模系统重用软件组件的方法。本研究的目的是通过给定的方法开发出合格的软件产品线，并加以利用。具体而言，我们的研究目标是核心资产的最优表示方法，建立明确的范围界定技术，以及核心资产的选择方法。为此，指出了存在的问题，提出了对策，并验证了其有效性。此外，我们还提出了一种新的核心资产维护方法。在本研究中，该产品线的应用将有可能使应用开发变得容易，实现高可靠性和高生产率。

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.