管线投资估算模型的种类很多,它们的不精确性与其通用的程度有关。建设费用是随“离开制造厂的距离,地形、地点、人力费、施工季节和其他可变因素”而变化。因此,保持建设费用的历史记录,并且经常地刷新这些记录对于建设公司的利益是至关重要的。一个精心研定的模型可以作为建设期间的一种经营管理的工具,既可以用以发现估算模型与“实际”之间的偏差,也可以帮助工程管理人员避免费用超 There are many types of pipeline investment estimation models, and their inaccuracy is related to their degree of generality. Construction costs vary according to “distance from the manufacturer, topography, location, manpower costs, construction season, and other variables.” Therefore, maintaining historical records of construction costs and refreshes them frequently are crucial to building the company’s interest. A well-developed model can be used as a management tool during construction, which can be used to find the deviation between the estimated model and the “real”, but also to help project managers to avoid cost-effective