【 Weak current College 】 ofthe construction progress control

According to the contract duration, complete construction tasks, this is the contract requirements for the achievement of business objectives. At this point, construction unit (owners) with the interests of both the construction units. Therefore, strengthen the construction progress control, ensure that the performance of the contract duration is the basic responsibilities of project managers and the main content.
Plan is a prerequisite for control, no plan, no control, the control is the actual and planned values are compared, identify gaps, and then give feedback. Prepare construction schedules, is to determine a control value, the duration of the programme and to develop a guarantee scheme implementation of effective measures to ensure that the duration of the contract to complete the task.
Prepare progress plan is decided when doing something, or when work is carried out to what extent. Whether the project itself, the procedure or other concerned with construction work that should be included in the schedule, or, on the progress made on a schedule. According to the content Division project schedule, including targeted schemes and support schemes. For the construction of their own progress plan is the most fundamental goals of the plan, it determines the duration of the project construction. In order to achieve this goal, to have a series of support schemes, such as material use plans, working materials use plans, machinery and equipment use plans, labor use plan and the Widget, use plan of semi-finished products and so on. The length of time control, a master schedule and phased plan. Total schedule control the whole process of project construction, and phased plan including this project year, quarter, month Xunyang and construction schedule, job scheduling, etc., from the expression, there is text description of the plan and chart-based plans. The former uses the text description of each stage of construction tasks, as well as to achieve the progress of the image; the latter using images and concise charts to show the progress of construction. As far as I know, the most common is the cross road plan, network planning, slash-and-planning, etc. From a management scope, there was overall progress plans and zoning plan. Master plan for the project global strategic progress plan arrangements, generally more rough; and the partition scheme is part of a project or a professional work schedules, more general comparisons.
Project schedule as well as the basis of
Basis has been engaged in construction of production and management practices, and learning to progress control theory, the author believes that the project construction plan as the basis of, first, the project's project contracts. The duration of the contract is to determine the duration of the planned values, the fundamental basis for the contractual date of completion of the project and must be implemented through the schedule to. Second, the project construction organization plan. This information identifies construction capacity deployment and construction organization methods, embodies the project's construction characteristics, thus becoming established at all stages in the process of construction of the target program. The third is the enterprise production and management of construction projects. Project schedule is part of the business plan, to enterprise management policy guidance, and meet the requirements of the planned overall balance. Fourth is the project design schedule. Drawing information is the basis for the construction, construction schedule must and design progress Plan phase dovetail, must be based on each part of the drawing data delivery date to arrange the appropriate parts of construction time. Fifth, the items inside material and equipment supply program. If you already have about the material and equipment and working materials supply plan, then the project construction schedule must be coordinated with them. In addition to the above five main basis, you should be aware of relevant information on site conditions, including the construction site of hydrological, geological, climate and environmental conditions, as well as transport, energy supply, secondary production, etc. Also in the preparation of project construction schedule prior to built like or similar items in the actual construction progress data collection, analysis, and seriously, lists the control's constraints, clear affect the duration the time limit for achieving mandatory for the preparation of the project's progress as well.
Construction progress of the network
Network diagram a clear logic, it would be clear that the project control schedule of work content, timing, and also be able to clearly demonstrate the intrinsic relationship between the work, to be able to use mathematical methods to analyse the calculation and optimization, network planning than crossing plan better more advantages, "network" in the construction business is used to control the project duration is becoming more widely used.
During construction, the order between the processes and their mutual relationship called a restriction of logical relationships between processes. These logical relationships can be divided into two categories. A class is determined by the construction process, called the process logic. Construction technology, process logic did not change. For example, the construction of residential, General, in accordance with the usual construction process, the Foundation is always done to wall, masonry wall to shop floor finished, cover a floor to cover the second floor, and so on. As long as the construction process, the logic will not be changed. Another kind of logic is determined by the method of construction organizations, called logical organization. Such logic often as construction conditions and work organization methods. For example, the Organization of two residential building construction, dig a building ground Groove and then dig b Bldg, ground Groove, finished with building, infrastructure and then do the basis, building b, so the first order of b after a relationship, is thanks to flowing water construction organization methods. It is most likely due to the strength of construction limited, does not go hand in hand and at the same time for two residential building construction. If you have enough strength, other conditions of construction also license, in order to shorten the overall duration, two residential buildings can go hand in hand with construction. Test large equipment supervision Division
In my view, consider the logical relationship clear logic, so that the project construction rule-based, that order cannot be altered. To process Web-based, considering the project construction site of the actual circumstances and conditions, including the actual investment in construction units and concrete adopted construction organization methods, plus the appropriate organizational logic, you can draw for the implementation of the construction of the network. In the project preparation stage, the construction organization plan, often only according to the established construction deployment and construction plan, determine the construction process of logical relationships between the draws a technology network. As the technology networkCollateral generally only consider technological requirements, is in the assumption that resources unlimited conditions, whatever the technology allows simultaneous construction work, are equal, the duration of the job arrangements generally shorter. However, in practice, resources are always scarce, and how to improve resource use efficiency, reduce the construction cost, you are scheduling must focus on practical issues in project construction used to guide the construction.
Project construction schedule optimization
Used to control the project construction progress of the programme should be streamlined. Planning Optimization, is the key to improving the economic efficiency.
Construction time, resources, effort and cost of consumption, is three interlinked and mutually restrictive factors. Project construction progress network optimization, that is by changing the logical relationships between processes, making full use of the key process of the slack to adjust duration, science, and continuously improve the initial plan, under certain restrictive conditions for optimization of project schedule.
Duration adjustment. Duration is typically a scheduling priority. To a certain resource usage and cost criteria, often need to properly adjust the scheduled duration to meet the stipulated duration requirements.
Lap water, reduce the duration. Between the different processes, the order of construction changed to joint construction, will be a crossing construction project synthesis of several water flow, organization, can shorten the duration. Before the operation is complete part, the latter procedure is inserted looks before and after construction, the process in different water segment parallel operation, ensure that meet the necessary construction face conditions, water segment share more thin, before and after the process is put into the construction of a time interval (flow step), construction of lap, less the total duration.
Reasonable sort, the shortest duration. A construction project can be divided into several operations, each pipeline segment must undergo the same number of processes, each process in the pipeline segment construction time was not exactly the same, how to choose a reasonable flow sequence is reasonable arrangements for the duration of the key issues. Because the construction technology decision order is not changed, but which flow section first, which flow section in the order of flowing water can be changed, different water order will cause the overall duration, you need to find the optimal sorting programme.
Resource balancing. Prepare construction schedules, you must balance resources. Not only requires the resources of the plan amount does not exceed the available supply of resources, but also seek to achieve a balanced use of resources. In other words, to make the resource plan usage control can supply resources limit. Obviously, the more tends to balance the resources usage, resource usage peaks less resources using fewer one-time costs, economic efficiency is better. For enterprises with human and material resources, if the plan of arrangement can make them every day and give full play to the efficiency, then the resource consumption is balanced, economic benefits will be good.
Cost optimization. In the project construction, the use of different construction organization plan, project cost will vary. Seek the lowest cost, is the construction progress of network optimization. The project cost by direct and indirect costs. In General, the direct costs low long programme duration; in order to shorten the duration, the need to adopt more efficient construction machinery or construction process, direct costs tend to be more efficient if not to change, you need to allocate more human and material, increase the use of resources, it will have the strength to widen the field of temporary facilities and subsidiary companies of scale of production, increase the input of the one-time costs, the results will lead directly to increased costs. Often the project manager Department always give priority to the use of those increased costs and shorten the duration not more effective methods. However, with the duration of short, direct costs will increase more quickly.
Indirect costs and project construction of relationship is not very direct, on-site construction, every day, roughly the total cost to happen so much. The longer the duration, the more costs are the costs and duration.