基于粗糙集的施工成本动态控制方法及应用

针对工程项目施工成本控制效率低、缺乏主动性与预见性的问题,提出基于粗糙集的施工成本动态控制模型,即在粗糙集理论框架下,以历史各期成本偏差信息为对象构建成本决策系统,根据可辨识矩阵的属性重要度评估各成本控制指标的重要程度;利用属性约简和规则提取算法获取各成本指标与总成本之间的变动规则,制定控制策略;同时,可将当期的成本信息并入下期决策系统,及时补充信息参与分析,以实现成本的动态控制。案例分析结果表明,该模型可通过对实际成本统计信息的分析获得成本指标权重与成本预测规则,且计算结果符合成本控制的一般规律,能够为施工企业的成本控制决策提供客观指导。

Dynamic Control of Construction Cost and Its Application Based on Rough Set

In order to improve efficiency, initiative and foreseeability of cost controlling during the process of engineering construction, this paper proposes dynamic cost controlling model based on rough set. According to the rough set theory, we establish cost decision system after preprocessing historic cost deviation information, and calculate attribute importance to estimate cost index on account of discernibility matrix simultaneously. And then we utilize attribute reduction and rule extraction algorithms to get the change rule between every cost index and total cost from historic information, and forecast cost change in the next control period and formulating strategy. This model merges current datum into the next control system, and supplies information to analyze the next cost activity for realizing dynamic cost controlling. After analyzing a case, the result shows that the method can get rules matching the general rule from realistic cost datum, and guides cost control decision for construction enterprise.