Systematization and Development of Analysis Tool on Effective Product Development Process Based on Design Rationale

本研究着眼于产品开发的内部过程，直到设计师或开发团队获得设计方案，并改进和发展称为设计原理的方法，找出其合理的轨迹。得到了以下结果：(1)讨论内容分类：以记录格式作为设计理据的基础，将其讨论部分按照时间、内容、授权级别进行分类，以便于发现过去和正在进行的项目中的潜在问题。其中内容修改类又进一步分为四种类型。(2)转换模式图的开发基于上述结构良好的记录格式，开发了转换模式图作为检测潜在问题的工具。(3)支持软件的实现为了实现计算机化的记录和分析，对IDEF3的自助软件进行了定制，分别利用其记录格式的评价功能和转换模式图的PFD和OSTN功能。通过较大规模的实际软件开发案例数据，验证了上述建议和实施的有效性。

This research focuses internal process of product development until designers or development teams obtain design solution, and improve and develop the methodologies so called design rationale finding out its rational trajectory. The following results were obtained.(1) Categorization of contents of discussions:Concerning the record format as a basis of design rationale, its discussion part was categorized in accordance with its time, content and authorization level in order to make easy finding potential problems in past and ongoing project. In particular modification of content category was further classified into four types.(2) Development of transition pattern diagramTransition pattern diagram was developed as a tool to detect the potential problems based on the above well structured record format.(3) Implementation of support softwareIn order to implement computerized record and analysis, self hand software of IDEF3 was customized utilizing its evaluation function for the record format and PFD and OSTN for the transition pattern diagram respectively.The validity and effectiveness of the above proposals and implementation were verified through the data of rather large scale real software development case.