照明是人類生活中不可或缺的基本需求，也是現代文明生活水準的重要指標之一，長期以來，照明用電更是國家競爭力以及進化的象徵。隨著經濟的成長，人類在照明的耗能也逐漸地增加，基於全球環境的考量，應該選擇適當的節電照明系統來使用，但是多管道的資訊來源以及公司本身的條件限制，會使得公司在選購時，無法以單一屬性或標準來決定，需要考量各個相關層面的因素。
本研究主要在探討，當工廠在採購照明系統時，以工廠管理主管的觀點，該如何從眾多照明系統供應商的提案中，選擇最理想的方案。本研究將照明系統採購方案的評選要素分為兩部分，分別為一般採購方案評選要素以及照明系統評選要素，先利用層級分析法建立層級架構，再透過成對比較問卷獲得各個屬性的權重值，接著，結合以TOPSIS評估法為基礎的評估模型，協助決策者在眾多提案中，選擇最理想的方案。
透過本研究的實例驗證可以知道，交期、照度、亮度以及初始成本等，屬性評估值為正理想解的方案為最佳方案。經由敏感度分析可以得知，大部分屬性權重值的改變都會使得方案排序產生變化。初始成本以及使用成本屬性評估値的改變，也會使得方案排序產生變化。

Lighting is necessary and indispensable for human beings. It is not only the basic needs but the important index to evaluate the living standards. For a long time, the energy usage on lighting is the symbol of competitiveness and progress of country. The consumption of energy or power has progressively increased with economic growth. To protect the world environment, we should use the energy-saving lighting system properly. However, we can’t evaluate the alternatives by single criterion or attribute because the evaluation process involves multi-source information and internal environment of the company. We should consider the factors from all relevant aspects.
This study aims to discuss how the industries managing to choose the best lighting system. This study divides the factors on procuring lighting systems into two categories, one is the general factors affecting procurement process of suppliers and the other is the factors affecting lighting system itself. This study combines the AHP and TOPSIS to find the best alternative. The AHP is applied to establish hierarchical structure and obtained the weights for each attributes. And the TOPSIS is used to rate the alternatives.
The case study shows that the alternative with the positive ideal solution on delivery, illuminance, luminance and initial cost will be the best solution. And, these parameters will affect the optimal solution through the sensitivity analysis. Different attribute weights will have different ranking orders. Changing the initial cost and usage cost will also make ranking order different.

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