公共工程品質以及社會成本一直以來都是社會大眾所關注的焦點，儘管政府為了改善因投標價格過低，造成後續的工程品質低落，透過多次修改《政府採購法》，但翻閱過去低價搶標與工程品質相關的研究，多數利用問卷調查及迴歸分析證實低價搶標與工程品質具有正相關，卻鮮少說明對於業主所支出的
成本差異性。
本研究利用 SIMUL8 建置模型，透過蒐集 2018 年至 2020 年建築工程最低標決標案 94 件，試圖探討低價搶標對於整個營造產業生態的影響，參與投標的廠商中出現採用低價策略的廠商，是否會造成整個投標過程失去公平性，以及探討若市場上長期存在低價搶標的問題，對於廠商特徵的組合以及業主有何影響。經多次模擬後發現，(1)採用低價策略的廠商影響營建產業生態的投標公平性；(2)採用低價策略的廠商造成業主更多的負擔；(3)低價搶標使得良好廠商逐漸被市場淘汰；(4)低價搶標使得社會成本逐年增加。研究成果證實若業主不重視低價搶標的問題，將會影響整個產業的組成結構，工程品質愈漸低落，增加更多的額外成本。
本研究冀望能夠利用多次模擬並彙整具有價值的資料，透過數據呈現臺灣最低標文化，提供業主對於最低標決標使用上的建議，並期盼未來政府以及相關單位，對於評選方式的選擇更為謹慎，研擬相關對策，提升整體工程品質。

The quality of public construction projects and social costs have always been the focus of public attention. To ameliorate the quality of subsequent projects due to low bidding price, the government has amended the "Government Procurement Law" several times, but abnormally low bids is positively correlated with project quality which was confirmed on questionnaire and regression analysis in previous studies. However, few studies have been done on the difference in cost from the owner.
This study explored the impact of abnormally low bids in the construction ecosystem using SIMUL8 software. The collection of 94 lowest-tender construction projects from 2018 to 2020 were hypothesized that the appearance of defective manufactures with low-price bidding will cause the bidding process to lose fairness. The research supposed that abnormally low bids effects the combination of manufacturers and the owner in the long-term in the construction ecosystem. The simulated data was indicated four issues as below. (1) Defective manufactures affect the fairness of bidding process in the construction ecosystem. (2)Defective manufactures cause the owner more burdens. (3)Abnormally low bids makes good manufactures gradually eliminated by the market. (4) Abnormally low bids makes the social cost increase year by year were. The research has presented when the owner ignore the problem of the “Abnormally low bids”, it would decline the project quality of the construction ecosystem, and increase the cost of the project as well.
The purpose of this study is to present both the culture of the lowest tender in Taiwan with multiple simulations and valuable data and the way of the lowest tender to the owners. In conclusion, government and related practitioners could take a prudent decision on precautions of selection and formulation countermeasures to improve overall project quality in the future.

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