一次经营既是二次经营和三次经营的前提,又是二次经营和三次经营的基础。二次经营既是一次经营的重要延续,又为以后其他项目的一次经营创造条件。但若没有三次经营,一次经营和二次经营的成果都将化为乌有。一般说,施工项目管理可分为五个阶段:投标与签约、施工准备、施工、收尾和回访保修。第一阶段的营销工作称为一次经营,其后四个阶段的营销活动为二次经营,二者之间的界限是签订合同。但工程竣工交验至按相关规定保修期结束,建设单位应付的工程款项不一定能够全部付清 A business is not only the premise of the two operations and three operations, but also the basis of secondary management and three operations. Secondary operation is not only an important continuation of a business, but also to create conditions for a business in other projects in the future. However, if there are no three operations, the results of one-time operation and two-time operation will be eliminated. In general, construction project management can be divided into five phases: bidding and signing, construction preparation, construction, closing and warranty repairs. The first phase of marketing is called one-time operation, the next four stages of marketing activities for the second operation, the line between the two is to sign a contract. However, the completion of the project until the completion of the relevant provisions of the warranty period, the construction unit to meet the payment of the project may not be able to pay in full