隨機森林及支持向量機應用於結構BIM建模及出圖人力成本預測能力之比較分析

COMPARISON OF RANDOM FOREST AND SUPPORT VECTOR MACHINE REGRESSION FOR PREDICTION OF BIM LABOR COST ON ARCHITECTURAL MODELING AND PLOTTING

黃建勳(Chien-Hsun Huang) ； 謝尚賢(Shang-Hsien Hsieh)

《中國土木水利工程學刊》 33卷5期 (2021/09) Pp. 389-398

https://doi.org/10.6652/JoCICHE.202109_33(5).0006

摘要

建築資訊塑模（BIM）近年來已廣泛應用於營建產業，因此執行相關作業所增加的人力成本便成為導入BIM作業時的重要議題。為評估機器學習技術能否更準確的預估BIM人力成本，本研究透過台灣某工程公司過去執行的21個案例所記錄的工時記錄資料為基礎，導入了隨機森林和支持向量機技術分別進行BIM執行人力成本預測，並與實務上常用的線型迴歸模型進行比較。結果顯示，在預測建置BIM結構模型人力成本時，隨機森林模型之MSE值為8.693，在所有模型中表現最佳。但在預測結構體施工圖產出的人力成本時，則以基於有效樓地板面積的線性迴歸模型表現最佳，其MSE值為2.186。

關鍵字

建築資訊塑模 ； 人力成本預測 ； 隨機森林 ； 支持向量機

並列摘要

In recent years, Building Information Modeling (BIM) has been widely used in the construction industry. The increased labor cost of executing related BIM uses also become an important issue when BIM is adopted into building projects. At present, the BIM labor cost estimation is mainly based on simple linear regression such as the percentage of the total construction cost or multiplying the total floor area by a coefficient. In order to evaluate whether machine learning technologies can more accurately estimate BIM labor costs, this research adopts the timesheets data of BIM tasks recorded in 21 projects executed by an engineering company in Taiwan to build two machine learning models, which are based on Random Forest (RF) and Support Vector Machine (SVM) respectively. The research results show that, based on leave-one-out cross-validation (LOOCV), by comparing the mean absolute error (MAE) and mean square error (MSE) of the two models, the RF model which the MSE is 8.693 and the MAE is 2.307 performs better than others for predicting the BIM labor cost on building structural BIM model. However, for the production of construction working drawing from the BIM model, the best model is the linear regression model based on effective floor area which its MSE is 2.186 and MAE is 1.118. The performance of both RF and SVM models have no significant advantage over the commonly used linear regression models.

並列關鍵字

building information modeling ； labor cost prediction ； random forest ； support vector machine

參考文獻

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