关键词: 工时估计, 流程工业, 决策树, 模型树

Abstract: Man-hour is affected mixed type factors,and man-hour function has the property of non-convex and non-continuity in process industry.To solve the low prediction precision of standard operation time,a man-hour estimation method based on decision tree and model tree was proposed,which was used to fit the non-linear relationship.For the data set of mixed attribute types,the nominal attributes were used to build the part of tree based on decision tree method,and the model tree method was used to construct each sub-tree.A case was used to demonstrate that the proposed method could reduce the estimation deviation by 19.4% on the basis of current method,and reduce the discrepancy between plan and execution.

Key words: man-hour estimation, process industry, decision tree, model tree