水泥砂漿粉刷工程為鋼筋混凝土建築中重要的項目之一，其品質對建築物的外觀 具有決定性的影響。為系統化提升水泥砂漿粉刷工程品質，本研究參考品質成本的觀念以及 國內通過國際標準組織認證廠商採用之粉刷工程自主檢查表，挑選對於粉刷品質之關鍵預防 活動製作問卷，調查訪問26個鋼筋混凝土集合住宅之現場管理人員。並採用向後逐次(Backward Step-wise)多元一次迴歸方法，來檢驗各種預防活動對粉刷工程瑕疵比率間的關係。 　　調查訪問結果顯示26個樣本的粉刷工程的平均瑕疵率為7.6%。迴歸分析結果則顯示：施 工前的試做、機器拌和、牆基準線檢查、與粉刷包商之長期合作關係、RC面灑水、瓷磚計畫 、粉刷圖說、材料供應商的實績評核、角尺之應用、施工標準書、品管圈活動、材料配比的 控制、粉刷完成後的養護等預防活動，分別對於降低粉刷工程瑕疵率具有顯著的效果。值得 作為現場管理者之工作重點參考。迴歸分析結果也顯示，目前採用噴漿工法有相當顯著增加 瑕疵比率的趨勢。

　　　　　Mortar finishing quality has a crucial impact on the appearance of a building. Based on the framework of quality costing, 26 high-rise housing projects are interviewed to identify quality prevention activities utilized in mortar finishing practices in Taiwan and their impacts. To clarify relative impact of each preventive activity, a model is built using a backward stepwise regression process. 　　Statistics show that the average defect ratio of mortar finishing of 26 high- rise housing projects is 7.6%. In the regression model, thirteen preventive activities are identified to have significant impacts on reducing defect ratio for mortar finishing. Analytical results also indicate that current mortar spraying method could result in a higher defect ratio in mortar finishing.