案例式推理是人工智慧與電腦輔助設計中一個新的研究領域。本文主要在於描述 設計者在案例式設計推理與案例調適之行為觀察與分析以作為案例式推理之前導性研究。 本研究經由四個設計實驗以瞭解案例在設計中之角色，設計者如何進行案例式設計與推理思 考。同時檢驗設計者如何應用尺寸與型態做案例調適，與設計生手與專家在案例調適上之差 異。總結，案例分析可以鞤助設計者達成快速雛型，且案例式設計為一可行之設計操作方法 。本研究從上述實驗觀察中提出案例的構成模型，並發現案例的調整有其侷限性，且使用者 選擇案例與案例的涵構及使用者之設計能力與意圖有關。

　　　　　Case-based reasoning is a new research paradigm in artificial intelligence and computer-aided design. This paper depicts the obersvations and analysis of case-base design and reasoning from design behavioral studies of case adaptatio. Four design experiments are undertaken to examine the role of cases in design, and how designers conduct case-based design and reasoning. The research also examines how designers apply dimensional and topological adaptation, and the differences of case adaptation by novice and experienced designers. In conclusion, this study provides the comparative analysis from the above observations. Case studies can facilitate design prototyping, and case-based design is useful for design formation. However, cases have limitations in adaptation. Case selection is related to case context, the design ability and intentions of the users.