本研究探討新產品開發關鍵成功因素與其管理方式，以及產品專案創新類型如何影響新產品開發關鍵成功因素之重要性，並辨別在不同產品專案創新類型下可提升新產品開發專案績效之關鍵成功因素。本研究以國內某汽車製造公司為個案研究對象，並透過問卷調查與統計分析之結果提出以下四項結論： 一、新產品開發關鍵成功因素構面包含供應商、技術母廠、經銷商、高階主管與跨功能團隊、新產品開發管理、績效評估與獎酬等六大構面。於新產品開發過程中，企業針對各構面設有相關的管理作法。 二、新產品開發關鍵成功因素之重要性會受產品專案創新類型不同而有所差異。 三、在大改專案下，高階主管與跨功能團隊構面、新產品開發管理構面、績效評估與獎酬構面對新產品開發專案績效構面有顯著正向影響。 四、在小改專案下，供應商構面、高階主管與跨功能團隊構面、績效評估與獎酬構面對新產品開發專案績效構面有顯著正向影響。 / The study focuses on several topics: critical success factors of new product development, product project innovative type’s influence on relative importance of critical success factors, identification of critical success factors which improve project performance in different product project innovative types. The study applies case study based on one motor manufacturing company, questionnaire, and statistical analysis. The results are as follows: 1. Critical success factors of new product development include supplier dimension, technical parent company dimension, distributor dimension, upper management and cross functional team dimension, new product development management dimension, performance appraisal and reward dimension. During the project time, the company establishes proper management regarding various dimensions. 2. The importance level of critical success factors is influenced by product project innovative types. 3. Under big projects, three dimensions which include upper management and cross functional team dimension, new product development management dimension, performance appraisal and reward dimension, have positive impact on project performance dimension. 4. Under small projects, three dimensions which include supplier dimension, upper management and cross functional team dimension, performance appraisal and reward dimension, have positive impact on project performance dimension.