When applying the network planning method, its steps are divided into two stages: planning and scheduling. The former is the stage of drawing the network diagram, that is, the stage of qualitative analysis of the plan. The latter is the stage of calculating the factors on the schedule plan and making the actual schedule plan after giving the estimated data (time and cost required, etc.) for each process in the network diagram. The obvious difference between the two stages is that, Website Design The planning method has greater characteristics than the previous schedule management method. For example, when using Gantt Chart to draw a schedule plan, you will not be aware of the difference between the two clearly, so you cannot determine the maneuvering time and critical path.
In the planning phase, draw a network diagram. The network diagram must accurately reflect the technical and management issues related to the plan to be implemented in the future, but in the process of drawing the network diagram, it is of great significance to further study, improve the plan content and rationalize it. Therefore, at this stage, we should focus on the wisdom of all personnel related to the completion of the plan and conduct full research. The time spent at this stage is by no means in vain, which is deeply appreciated by people who actually use the network planning method. In studying and drawing the network diagram, it is natural to find a more reasonable method than the previous work steps. It can be seen that the method of only summarizing unit work is not suitable for management. It is also important for relevant planners to put forward a clear and consistent image of what they are going to do in the future and clarify their responsibilities in the whole work. The larger the scale of the plan, the more effective this will be, and this plan is also suitable for people with little operating experience or for communicating intentions to the person in charge of the cooperative unit.
The second stage is the scheduling stage, which checks the time required for each process, the estimated costs and personnel required according to the needs, and then calculates the planned schedule on this basis. The time required for each process gives the normal status value that is not affected by the completion period, which forms the schedule. Then compare the schedule with external requirements such as completion date. If it is necessary to shorten the schedule, it is necessary to find out what can be shortened from the whole plan and study which processes should be taken. If the research is carried out on the basis of the whole schedule, the relationship between each process and the whole network can be determined, that is, the critical path, the maneuver time, etc., and appropriate measures can be taken on this basis.
The schedule prepared in the planning and oral arrangement stage will be improved to meet the requirements through repeated consideration and research according to the external requirements of the construction period. Revise the plan and schedule several times according to different situations. The final schedule that can be put into practice is thus prepared, which is called the initial plan. Start the implementation of the plan according to the initial plan. The implementation of the plan is based on this initial plan, and the deviation from the plan should be checked frequently. To keep this deviation to a minimum, efforts should be made in management. It is necessary to regularly monitor the progress of the plan. If the accurate information about the progress cannot be accurately grasped, although the initial plan is well prepared, the schedule management cannot be well carried out. Because the network planning method can correctly evaluate the different impacts of the speed of each process on the progress of the whole plan, it can help managers to take measures in a timely manner under various circumstances. This is called tracking the schedule. Because the network diagram and the time required for each operation in the initial plan are initially estimated, more accurate values should be given while the plan is in progress. In order to restore the delay that has not been estimated in advance in the plan implementation to normal, the steps and time required for the operation should also be changed. The completed process should be removed from the network diagram and replaced with the actual time required. The general diagram of work flow is shown in Figure 9-1. At present, efforts are being made to incorporate these management steps into the actual computer program, and then take the plan management system as a network plan computer program system used as a whole.
