【正文】 e construction project delivery. With the construction of the increasingly fierce market petition, construction enterprises to make a profit in the lowcost projects, should pay attention to the project management. In project management, quality control, schedule, cost is the main content of project management, which people tend to quality, cost management are particularly seriously, but for construction progress management seems to have ignored. In fact, construction project construction schedule control, construction management is an important part, has a special important status and function. 1．The status and role of the construction progress control Schedule control is the construction of the project construction phase of the working procedure and the last time for planning, general term of a series of activities, such as inspection, investigation. Project schedule control, is an important and plex task in the process of engineering construction, is an important part of the three main objectives of the project construction. It is conducive to play as soon as the investment benefit, is conducive to the maintenance of good economic order, improve economic benefit. In the construction of disorderly pursuit of construction period, do not do scientific time calculation, will be in the planning period to abnormal construction speed rush deadlines, the labor intensity of workers increase, quality objectives are difficult to control, the quality problems in construction engineering, serious still can cause rework and not rework issues (onetime construction cause). There is not a reasonable construction plan in construction, can not guarantee plete construction product conformity within a reasonable time. Construction, estimation, edge measures is used although control method in the matter, but in the absence of early period planning case is a kind of method of work blindly, is not up to the time limit for a project control objectives. Don39。t schedule planning specific, is a kind of phenomenon exist some construction team, it will because of underestimation of construction, organization construction not reasonable, resulting in the extension of the time limit, the pletion of construction tasks, to plete the enterprise economic benefit for loss, pleted on schedule impact construction unit investment task. From the above discussion, we can see the unilateral pursuit of time can produce quality problem, cause rework, will reduce the economic efficiency of construction enterprises, affect the construction unit investment benefit as soon as possible to play. Only to make a good construction organization design, construction scheme, the task of the project progress control and project quality control work, to plete a qualified construction products within a reasonable time limit. Whether the project is delivered within a predetermined time, for the owners, directly related to the use of project economic benefits. The construction unit, construction schedule in accordance with the requirements of the contract, on the basis of ensuring engineering quality, on time or early pletion, to the important role of engineering cost saving. In our project appraisal, the key point is: the project schedule delays, increased construction cost, time delay longer project, even the cost of losses. Such as: our hospital boiler room project, the contract period is 300 days, the actual construction of 450 days, found in the settlement, artificial cost budget cost is higher than 11%, machinery rental, amortization expenses increased by 20%, because of the rise in the later stages of the project of the steel and other materials, causing the material cost from behind a budget costs 7% more than. Directly increase the cost, so that the original can be profitable projects caused losses. Schedule control, plays an important role in project management. 2. Factors affecting the construction progress of the projectThe factors affecting the project progress, is generally believed that the human factors, technical factors, financial factors and other factors. （1 ）human factors Work of project participants. If the owners use requirements change and design change, can not be timely decisionmaking。 design unit tardiness, design content is not perfect, the design defects or errors: the total package units on the wrong selection of package units。 construction quality inspection station, delayed the approval time. Such as Institute of administrative building to the five floor in the main structure of the construction, the proposed six layer office have added room, boiler room project in construction, because the package technology unit Construction Co. and subcontracting units were replaced, causes the two single project construction delay claims, produce, thus affecting the cost, schedule the project. （2）technical factors Characteristics and the project of the project to achieve the conditions of unclear understanding. For example, a low estimate of the technical difficulties of project, does not take into account the encountered problems in the design and construction, need to carry out research and test, it is in need of funds also need time. （3）factors of funds Due to the owner or the construction side of the funds were not in place in time, a floating exchange rate and inflation, directly affect the progress of the project. Capital factor is one of the main reasons for the progress of the project impact. （4）other factors Mainly has: the material factors, equipment factors, equipment factors, climatic factors, environmental factors.