隨著產品生命週期的縮短，新產品的開發越顯重要，品質機能展開(QFD)是在產品開發階段將顧客需求與產品屬性連結的有效工具。但傳統的品質機能展開必須大量仰賴專家的意見，有過於主觀的缺點，故本研究先以LED投射燈為例，發展出以專利分析所得到的產品技術/功能矩陣的產品功能取代品質機能展開的產品品質要求的概念，再結合修正式ANP分析網路程序法和修正式決策實驗室分析法(修正式DEMATEL)的方法，定義出所需要之功能改善方案的優先順序。將所得之功能改善方案之優先順序再查核產品技術/功能矩陣，針對其要改善的功能選擇可應用的技術，將其應用在修正式TRIZ方法作為產品設計時創新方法構思的依據。傳統DEMATEL是透過專家意見以問卷方式決定0~4之影響度之值，分別代表「無影響」、「低影響」、「中影響」、「高影響」、「極高影響」，而本研究首先提出修正式DEMATEL方法，其經由常態化數值的概念來評估準則間0~4的相互影響程度。常態化數值是依照多篇專利技術文件經由斷詞斷字系統之重要技術、功能、元件關鍵字出現次數與高度相關專利群組全文總字數之比值。以LED投射燈為例，先用QFD的概念構出以專利分析所得到的產品技術/功能矩陣，初步分類出七項最重要功能準則，透過每個準則所具有的相關功能字以及常態化數值，先計算準則間重複或定義相同的功能字常態化數值比例値，來評估決定準則間的相互影響程度0~4之值。接著再依照修正式DEMATEL運算步驟求出總關係影響矩陣、直接/間接關係圖及因果圖，完成以產品功能為主的修正式DEMATEL的步驟。產品之各功能領域的因果圖可協助判斷各功能領域的相互受影響程度以及哪些功能領域為屬於較核心功能的判定。再將產品功能為主的修正式 DEMATEL之總關係影響矩陣加入修正式網路程序分析法(修正式ANP)中，形成修正式 DANP，即可得LED投射燈的功能改善方案的優先順序。
本研究先針對LED投射燈之功能改善方案作出優先順序的選擇。此外，本研究將產品功能結合修正式DANP實際應用於LED舞台燈，經由LED舞台燈產品之相關文獻探討及各項專利分析，將LED舞台燈的第一層功能分為1. 增加結構強度和使用方便性， 2. 提高散熱性及壽命+提高照明亮度及光源性能，及3. 增加結構強度和使用方便性+提高散熱性及壽命三項主要功能，再將第二層功能分為1.提高結構穩定性、2.增加使用方便性、3.提高散熱性、4.降低成本、提高品質及壽命、5.提高照明強度、6.光源可調及7.提供電能、省電等7項功能領域，並將此7項功能領域做為評選產品設計方案最重要的評估功能準則。接著透過以產品功能為主之修正式DEMATEL所分析出的因果圖來分析上述七項功能領域的核心功能及各功能領域的相互受影響程度。本研究將LED舞台燈的第一層功能的三項主要功能組成具有功能相依性的三個功能改善方案，以產品功能為主之修正式DANP步驟，計算三項功能改善方案的優先評選次序。最後演算得到LED舞台燈三個功能改善方案之優先權值，其優先權值最大者即為優先考慮的功能改善方案。經本文之產品功能結合修正式DANP優先評選次序研究以後，本研究再應用LED舞台燈的產品技術/功能矩陣，就優先選擇的功能改善方案，對應可應用之技術，選擇適當的技術領域做改善，再利用修正式TRIZ發明法做創新改良設計，最後可得到新設計之LED舞台燈。

With the shortening of life cycle of products, development of new products is more and more important. Quality function deployment (QFD) is an effective tool to connect customers’ needs with product attributes at product development stage. However, conventional QFD had to immensely rely on experts’ opinions so that there was a shortcoming that the opinions were too subjective. Therefore, the paper takes LED projection lamp for example, and then develops a concept that product functions of product technical/functional matrix obtained from patent analysis can replace the QFD product quality requirements. The paper also combines modified Analytic Network Process (ANP) with modified Decision-making Trial and Evaluation Laboratory (DEMATEL) method to define the priority of the required functional improvement plans. After having acieved the priority of functional improvement plans, the product technical/functional matrix can be checked again. Applicable techniques can be selected for the functions to be improved, and applied to modified TRIZ method to serve as a reference for conceiving innovative method during product design. In conventional DEMATEL, experts’ opinions determine the influence from 0 to 4 in questionnaires, with 0~4 representing “no influence”, “low influence”, “medium influence”, “high influence” and “extremely high influence” respectively. First of all, the paper proposes modified DEMATEL method. Through the concept of normalized numerical value, the mutual influence can be evaluated from 0~4 in the criteria. Normalized numerical value is, according to multiple documents of patent techniques, a ratio of appearance frequency of important techniques, functions and component keywords of term and word segmentation system, to the total number of words of the full texts of those highly-correlated patent groups. Taking LED projection light for example, QFD concept can be used first to conceive a product technical/functional matrix obtained from patent analysis; and the matrix is preliminarily categorized into 7 most important function criteria. Through the related functional words in each criteria and normalized numerical values, the normalized numerical value ratio of the repeated functional words or those with the same definitions in the criteria are calculated first. Then the mutual influence at 0~4 in the criteria can be evaluated and determined. After that, according to modified DEMATEL algorithmic steps, general relational influence matrix, direct/indirect relationship diagram and causal diagram can be acquired, and then the product function-based modified DEMATEL procedure is completed. The causal diagram of different functional areas of product can help judge the mutual influence among different functional areas and determine which functional areas belong to core functions. Then the general relational influence matrix of product function-based modified DEMATEL is added to modified ANP to form a modified DANP. As a result, the priority of functional improvement plans for LED projection light can be acquired. The paper firstly conducts selection of priority of functional improvement plans for LED projection light. Besides, the paper combines product functions with modified DANP for actual application to LED stage light. Through the related literature review of LED stage light products and analysis of different patents, the first functional layer of LED stage light is divided into three main functions: 1. Enhance structural strength and convenience of use; 2. Enhance heat dissipation and extend life + Enhance irradiation strength and light source performance; and 3. Enhance structural strength and convenience of use + Enhance heat dissipation and extend life. Then the second functional layer is divided into seven functional areas: 1. Enhance structural stability; 2. Enhance convenience of use; 3. Enhance heat dissipation; 4. Reduce cost, improve quality and extend life; 5. Enhance irradiation strength; 6. Make light source adjustable; and 7. Provide electricity and energy-saving function. These seven functional areas are taken as the most important functional evaluation criterion in selection of product design plans. After that, through the causal diagram achieved from analysis by the product function-based modified DEMATEL, the core functions of the above seven functional areas and the mutual influence among different functional areas are analyzed. Using the three main functions on the first functional layer of LED stage light, the paper forms three functional improvement plans that have functional dependency on each other. The product function-based modified DANP can be used to calculate the priority of three functional improvement plans for selection. Finally, through algorithm, the priority of three functional improvement plans for LED stage light is obtained. The one with the greatest priority value is just the functional improvement plan to be considered in the first priority. After studying combination of product functions and modified DANP priority for selection, the paper further applies the product technical/functional matrix of LED stage light, to find the corresponding applicable techniques of the first choice of functional improvement plan, and selects a suitable technical area to make improvement. Modified TRIZ invention method is then used to make innovative improvement and design. Finally, a newly designed LED stage light can be achieved.

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