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过去在水利工程的施工中,编制施工进度计划横道图是施工中应用最广、历时最长的进度计划表现形式,它虽有许多优点,但仍有许多不足之处。诸如用横道图表达的进度计划,其方法简单,表现形式效果直观,但难于完整确切地反映各个工作项目之间互相依存和制约的关系,且不易用数学模型来处理。而网络计划技术可以确切地表明各个工作项目之间的逻辑关系,找出工程中的关键项目和关键线路,并可随工程的进展情况对计划进行优化,因此,网络计划技术在目前国内外的各类工程得到了广泛的应用和推广。
In the past in the construction of water conservancy projects, the preparation of construction schedule plan is the most widely used construction, construction of the longest schedule of manifestations, although it has many advantages, but there are still many shortcomings. For example, the progress plan expressed in the horizontal bar graph is simple in approach and intuitive in appearance, but it is difficult to completely and accurately reflect the interdependence and restriction among various work items and can not be easily dealt with by mathematical models. The network planning technology can accurately indicate the logical relationship between the various projects to identify the key projects and key lines in the project, and with the progress of the project to optimize the plan, therefore, network planning technology at home and abroad Various projects have been widely used and promoted.