本文主要探討產品外形特徵之觸覺形態特徵與其導引操作方向之關係，期能縮短判定時間和降低操作錯誤率，輔助使用者對產品操作之正確性認知。研究初期，分別觀測單獨以視覺和觸覺感官判定操作方向認知之關係，確立研究變項的關係性與相關研究之假設；第二，進行擷取代表性之觸覺形態特徵的參數變項，依據田口式穩健設計法直交表及結合快速原型技術，製作實體樣本，並接續執行實驗與變異數分析。研究結果顯示，若受測者只感受到單一觸覺形態特徵，會以自身的慣用操作方向或操作經驗操作；若觸覺感受為具有兩種明顯差異的形態特徵，部分受測者將會比較其所接觸兩種形態特徵之施力的容易性，而選擇較易施力的形態特徵，進行操作。

This paper aims to explore the tactual form features of manufactured products and focuses on how the products can guide the operation. This will reduce not only the time spent on judgment but also incidences of errors in operation, thus imbuing users with the knowledge of accurate operation. At the onset of this research, emphasis is laid on observing how visual and tactual perceptions relate to each other. Furthermore, relationships among variables and assumptions of related research are also specified. Following that, variables representative of tactual form features are extracted to construct sample parameters, while material samples are made through rapid prototyping and Taguchi methodology. The result indicates that users might resort to their habitual operation method if they only perceive a single tactual form feature. However, if users detect two distinctive form features, they might choose preferentially the one that appear easy to apply force.