Building project resource scheduling optimization method based on BIM

Abstract

The invention relates to the technical field of project management, in particular to a BIM-based building project resource scheduling optimization method, which comprises the following steps: based on the current progress state of a construction task, collecting the consumption of constructors, mechanical equipment and materials, comparing the task plan progress with the real-time progress, screening out construction links with the backward task progress, and establishing a construction project resource scheduling optimization model; and judging a resource type, and establishing a task progress offset. According to the method, the construction progress is accurately monitored, real-time evaluation of resource consumption is achieved, waste and scheduling lag are avoided, the construction path is optimized by means of the BIM model, the key path monitoring precision is improved, progress management and control effectiveness is ensured, key path progress deviation is analyzed, the resource shortage risk is recognized, stable supply of construction resources is guaranteed, and on the basis of the influence of resource shortage, the construction efficiency is improved. The resource distribution sequence is optimized, the resource utilization efficiency is improved, the supply chain delivery cycle is matched, the resource scheduling is optimized, the influence of resource supply and demand imbalance on the construction progress is reduced, and the continuous and stable construction progress is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of project management, and particularly to an optimization method for building project resource scheduling based on BIM. Background Art

[0002] The technical field of project management includes effectively configuring, managing, and scheduling various resources in the project life cycle to ensure that the project is completed on time, with high quality, and in full quantity. This field involves multiple aspects such as project plan formulation, progress control, cost management, quality management, and human resource management. The core content is to reasonably schedule and optimize various resources in the project through scientific management methods and technical means to achieve the maximum utilization of resources, the minimization of costs, and the efficient achievement of project goals. The optimization methods in the technical field of project management include schedule optimization, resource allocation, risk management, etc., aiming to improve the efficiency and quality of project execution.

[0003] Among them, the optimization method for building project resource scheduling refers to addressing various technical issues in the resource scheduling process of building projects. Through a series of management measures and scheduling strategies, it scientifically plans and reasonably allocates resources such as labor, equipment, and materials required for the project. This method involves determining the priorities of various tasks and subtasks in the project, and in combination with the actual situation of the project, through reasonable allocation of resources, it optimizes the use of various resources during project execution, including scheduling human resources, equipment resources, and material resources according to the progress requirements of the engineering project to ensure the smooth progress of all links of the project. This method also adopts a method of dynamically adjusting resource allocation in combination with the characteristics of different stages of the project to cope with unexpected situations or changes that occur during project execution.

[0004] There are still certain deficiencies in the existing technology in terms of resource scheduling, mainly reflected in the insufficient monitoring of construction progress deviation, which in turn affects the accuracy of resource allocation, resulting in limited accuracy of construction progress control; the task dependency relationship in the construction path has not been effectively utilized, leaving room for improvement in critical path monitoring, and the progress of critical tasks may be delayed, which in turn has an adverse impact on the overall construction period; the resource demand assessment is mainly based on static plans and it is still difficult to dynamically adjust according to the actual construction situation, easily leading to resource shortages or waste; there is a lack of systematic analysis of task urgency in the resource scheduling process, and the task priorities have not been effectively identified, which may thus trigger resource conflicts and reduce the utilization efficiency of construction resources; in terms of equipment and material scheduling, the real-time status and supply chain cycle have not been fully combined, and there is a certain lag in the scheduling response ability, affecting the continuity and stability of construction progress. Summary of the Invention

[0005] To address the existing deficiencies in resource scheduling in the prior art, which are mainly reflected in the insufficient monitoring of construction progress deviations, thus affecting the accuracy of resource allocation and resulting in limited accuracy in construction progress control; the task dependencies in the construction path not being effectively utilized, leaving room for improvement in critical path monitoring, with the progress of critical tasks possibly being delayed, thereby having an adverse impact on the overall project duration; the resource demand assessment being mainly based on static plans and being difficult to dynamically adjust according to the actual construction situation, easily leading to resource shortages or waste; the lack of a systematic analysis of task urgency in the resource scheduling process, failing to effectively identify task priorities, which may trigger resource conflicts and reduce the utilization efficiency of construction resources; and in the aspect of equipment and material scheduling, not fully integrating real-time status and supply chain cycles, with a certain lag in scheduling response capabilities, affecting the continuity and stability of construction progress, the embodiments of the present invention provide an optimized method for building project resource scheduling based on BIM. The technical solutions are as follows:

[0006] An optimized method for building project resource scheduling based on BIM is provided, and the method includes:

[0007] S1: Based on the current progress status of construction tasks, collect the consumption of construction personnel, mechanical equipment, and materials, compare the planned task progress with the real-time progress, screen the construction links with lagging task progress, determine the resource type, and establish the task progress offset;

[0008] S2: Invoke the task progress offset to identify the task dependencies in the BIM model, screen and form the construction path, calculate the total duration of the path, screen the paths with long durations, detect the task progress offset on the path, and establish the critical path progress offset value;

[0009] S3: Invoke the critical path progress offset value, analyze and monitor the usage of steel bars, formwork, and concrete pump trucks, evaluate the resource requirements of construction tasks, compare the current inventory, on-site consumption, and supply chain delivery volume, screen the resources with inventory lower than the demand, identify the number and delay time of affected tasks, and obtain the resource shortage impact degree;

[0010] S4: Invoke the resource shortage impact degree, screen the task pairs with resource scheduling conflicts, analyze the urgency of the duration of each task, screen the critical tasks affected by resource shortages, adjust the resource allocation order, and output the resource scheduling priority sequence.

[0011] As a further solution of the present invention, the task progress offset includes a progress difference value, a resource consumption deviation, and a construction link lag. The critical path progress offset value includes a critical task delay amount, a total path float, and a construction stage progress offset. The resource shortage impact degree includes the number of affected tasks, the delay time, and the resource supply-demand difference value. The resource scheduling priority sequence includes the project duration urgency, the resource demand level, and the task conflict intensity.

[0012] As a further solution of the present invention, the steps of the task progress offset are specifically as follows:

[0013] S101: Based on the current progress status of the construction task, collect the working hours of construction personnel, the running duration of mechanical equipment, and the material consumption, identify the cumulative resource usage, compare with the planned consumption value, determine the resource consumption deviation, and obtain the resource consumption deviation value;

[0014] S102: Based on the resource consumption deviation value, identify the task completion ratio, determine the construction link progress offset, screen the task progress lag links, analyze the lag amplitude of the links, and obtain the construction link progress lag rate;

[0015] S103: Invoke the construction link progress lag rate, judge the resource type of the lag link, identify the proportion of the resource type in the lag link, evaluate the impact degree of the resource on the progress lag, and obtain the task progress offset.

[0016] As a further solution of the present invention, the steps of the critical path progress offset value are specifically as follows:

[0017] S201: Invoke the task progress offset, identify the task dependencies in the BIM model, analyze the front-back order between tasks, screen the task combinations that meet the dependency rules, form multiple construction paths, calculate the total duration of the paths, and obtain the construction path duration value;

[0018] S202: Based on the construction path duration value, screen the paths with longer durations, lock the task nodes, calculate the progress offset of the task nodes on the path, detect the offset situation of the tasks, calculate the offset amplitude of the tasks on the critical path, count the total task offset, analyze the impact of the offset on the total duration, and obtain the critical path progress offset value.

[0019] As a further solution of the present invention, for the critical path progress offset value, the formula is:

[0020]

[0021] Wherein, ΔP k represents the progress offset value of the kth critical path, T i,k represents the current progress time of task i on critical path k, T i,k-1Represents the progress time of task i on the critical path k during the previous calculation, C k Represents the average construction period of tasks on the critical path k, and n represents the total number of tasks on the critical path k.

[0022] As a further solution of the present invention, the steps of the resource shortage impact degree are specifically as follows:

[0023] S301: Based on the critical path progress deviation value, analyze the planned progress, actual progress and deviation amount, identify the fluctuations in construction resource requirements, and obtain the construction resource requirement fluctuation value;

[0024] S302: Based on the construction resource requirement fluctuation value, call the data of inventory quantity, on-site consumption quantity and supply chain delivery quantity, screen the resource categories and shortage quantities with inventory lower than the demand quantity, identify the severity of resource shortage, and analyze the change trend of resource shortage in combination with the resource consumption rate to obtain the resource shortage quantity;

[0025] S303: Call the resource shortage quantity, analyze the affected construction tasks, calculate the number of tasks and the construction period delay time, judge the impact of resource shortage on the construction progress, and obtain the resource shortage impact degree.

[0026] As a further solution of the present invention, for the construction period delay time of the task, the formula is used:

[0027]

[0028] Where, ΔT delay Represents the construction period delay time of the task, R shortage Represents the resource shortage quantity, C task Represents the resource quantity required for the construction task, C avai lable Represents the available resource quantity, T task Represents the actual construction period of the task, T estimated Represents the estimated construction period of the task, D e Represents the e-th influencing factor, and m represents the total number of influencing factors.

[0029] As a further solution of the present invention, the steps of the resource scheduling priority sequence are specifically as follows:

[0030] S401: Call the resource shortage impact degree, screen the resource scheduling in the construction tasks, analyze the overlapping degree of resource occupation among tasks, and obtain the resource scheduling conflict task pairs;

[0031] S402: Based on the resource scheduling conflict task pairs, analyze the urgency of task duration, extract the duration offset, remaining duration, and logical relationships between tasks, determine the critical tasks affected by resource shortages, screen the resource demand occupancy in the critical tasks, determine the priority order of critical tasks according to the resource demand intensity, adjust the allocation order of resources among critical tasks, and obtain the critical task resource allocation sequence;

[0032] S403: Invoke the critical task resource allocation sequence, adjust the resource supply order according to the task priority, and combine with the construction task logical relationships to sort the execution order of tasks, and obtain the resource scheduling priority sequence.

[0033] As a further solution of the present invention, the method further includes step S5:

[0034] S5: Based on the resource scheduling priority sequence, identify the available status of construction tower cranes and concrete mixing plants, screen the standby resources that meet the scheduling conditions, match the delivery cycle of the resource supply chain, and perform building resource scheduling adjustment;

[0035] The building resource scheduling adjustment includes equipment allocation plans, material scheduling strategies, and supply chain delivery plans.

[0036] As a further solution of the present invention, the steps of the building resource scheduling adjustment are specifically as follows:

[0037] S501: Invoke the resource scheduling priority sequence, extract the available status data of construction tower cranes and concrete mixing plants, analyze the equipment idle duration and current task occupancy, screen the available equipment that meets the scheduling conditions, and obtain the list of schedulable equipment;

[0038] S502: Based on the list of schedulable equipment, screen the standby resources that meet the scheduling conditions, analyze the resource adaptability, match the delivery cycle of the resource supply chain, screen the resources that meet the scheduling requirements, and determine the allocation order of resources according to the resource supply and demand matching degree, and obtain the building resource matching sequence;

[0039] S503: Invoke the building resource matching sequence, adjust the resource scheduling order according to the construction task priority, and combine with the task execution requirements to perform building resource scheduling adjustment.

[0040] The beneficial effects brought by the technical solutions provided by the embodiments of the present invention at least include:

[0041] By strengthening the refined monitoring of the progress of construction tasks and combining the analysis of actual resource consumption and planned progress deviations, a dynamic assessment of resource usage can be achieved to reduce resource waste and scheduling delays; with the help of BIM models, the logical relationship between construction tasks can be deeply analyzed, the construction path structure can be optimized, the critical path monitoring capability can be strengthened, and the scientific nature of progress control can be improved; based on the analysis of the progress deviation trend of the critical path, the actual demand for key construction resources can be more accurately judged, and combined with the inventory status, on-site usage and supply chain supply rhythm, resource supply risks can be identified in a timely manner to improve resource guarantee capabilities; further combined with the urgency of the task and the supply and demand of resources, the task priority levels can be reasonably divided, the resource allocation strategy can be optimized, and the pertinence and utilization efficiency of resource scheduling can be improved; combined with the evaluation of the status of available equipment, spare resources can be scientifically selected, the supply chain delivery plan can be matched, and the resource scheduling adjustment plan can be reasonably optimized to alleviate the imbalance between supply and demand and ensure the consistency and stability of the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the workflow of the present invention;

[0043] Figure 2 This is a detailed flow chart of S1 of the present invention;

[0044] Figure 3 This is a detailed flow chart of S2 of the present invention;

[0045] Figure 4 This is a detailed flow chart of S3 of the present invention;

[0046] Figure 5 This is a detailed flow chart of S4 of the present invention;

[0047] Figure 6 This is a detailed flow chart of S5 of the present invention. DETAILED DESCRIPTION

[0048] The technical solution of the present invention is described below in conjunction with the accompanying drawings.

[0049] In the embodiments of the present invention, words such as "exemplarily" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "example" is intended to present the concept in a specific way. In addition, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or it can be either of the two.

[0050] In the embodiments of the present invention, "image" and "picture" can sometimes be used interchangeably. It should be noted that when not emphasizing the difference, their intended meanings are the same. "Of", "corresponding", and "corresponding to" can sometimes be used interchangeably. It should be noted that when not emphasizing the difference, their intended meanings are the same.

[0051] In the embodiments of the present invention, sometimes a subscript such as W1 may be written in a non-subscript form such as W1. When not emphasizing the difference, their intended meanings are the same.

[0052] To make the technical problems, technical solutions, and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0053] Please refer to Figure 1 , the embodiments of the present invention provide an optimization method for building project resource scheduling based on BIM. The processing flow of this method may include the following steps:

[0054] S1: Based on the current progress status of the construction tasks, collect the consumption of construction personnel, mechanical equipment, and materials, compare the task planned progress with the real-time progress, screen the construction links with lagging task progress, judge the resource type, and establish the task progress offset.

[0055] S2: Invoke the task progress offset, identify the task dependencies in the BIM model, screen and form the construction path, calculate the total duration of the path, screen the paths with long durations, detect the task progress offset on the path, and establish the critical path progress offset value.

[0056] S3: Invoke the critical path progress offset value, analyze and monitor the usage of steel bars, formwork, and concrete pump trucks, evaluate the resource requirements of the construction tasks, compare the current inventory, on-site consumption, and supply chain delivery volume, screen the resources with inventory lower than the demand, identify the number and delay time of the affected tasks, and obtain the resource shortage impact degree.

[0057] S4: Invoke the resource shortage impact degree, screen the task pairs with resource scheduling conflicts, analyze the urgency of the duration of each task, screen the critical tasks affected by the resource shortage, adjust the resource allocation order, and output the resource scheduling priority sequence.

[0058] S5: Based on the resource scheduling priority sequence, identify the available status of construction tower cranes and concrete mixing plants, screen the standby resources meeting the scheduling conditions, match the delivery cycle of the resource supply chain, and execute the adjustment of building resource scheduling.

[0059] The task progress offset includes the progress difference value, resource consumption deviation, and construction link lag. The critical path progress offset value includes the critical task delay volume, total path float, and construction stage progress offset. The resource shortage impact degree includes the number of affected tasks, delay time, and resource supply-demand difference value. The resource scheduling priority sequence includes the project duration urgency, resource demand level, and task conflict intensity. The construction resource scheduling adjustment includes the equipment allocation plan, material scheduling strategy, and supply chain delivery plan.

[0060] Specifically, as Figure 2 shown, the steps of the task progress offset are specifically as follows:

[0061] S101: Based on the current progress status of the construction task, collect the working hours of construction workers, the running duration of construction machinery and equipment, and the material consumption, identify the cumulative resource usage, compare with the planned consumption value, determine the resource consumption deviation, and obtain the resource consumption deviation value;

[0062] First, it is necessary to collect the working hours of construction workers, the running duration of construction machinery and equipment, and the material consumption. This can be achieved through on-site information collection devices or automated data recording modules of management. For example, the working hours of construction workers can be collected and entered in real time through working hour records, such as attendance or intelligent monitoring tools. The running duration of construction machinery and equipment can be obtained through intelligent devices or location trackers, and the material consumption can be accurately counted through material in-and-out management. After data collection, according to the project progress plan, compare with the predetermined planned consumption to obtain the difference between the actual consumption data and the planned consumption data of resources, and then obtain the resource consumption deviation value. If a certain construction task originally planned to consume 1000 kg of steel, but the actual consumption is 1200 kg, the resource consumption deviation is 200 kg. The deviation value will further provide a basis for the adjustment of the construction plan and be used for subsequent progress optimization.

[0063] S102: Based on the resource consumption deviation value, identify the task completion ratio, determine the construction link progress offset, screen the task progress lagging links, and analyze the lag amplitude of the links to obtain the construction link progress lag rate;

[0064] The actual completion ratio of the task can be identified through the obtained resource consumption deviation value. For example, in construction, assuming that the total construction period of a task is 10 days, the planned construction resources should consume 500 tons of cement in the first 5 days, but the actual consumption is 550 tons. The progress deviation reflects the real-time progress lag, and the progress offset of the construction link will be calculated, that is, the gap with the scheduled plan. This offset is a ratio obtained by dividing the real-time progress by the planned progress. If a construction link is planned to complete 50% of the task volume on the 5th day, but actually completes 40% on the 5th day, the progress offset of the link is 80%. For the link with lagging progress, by comparing the gap between the progress of each link and the planned progress, the link with a larger lag is selected, and the lag range of the link is further analyzed to obtain the progress lag rate of the construction link. For example, assuming that the planned task volume of a construction link is 1,000 square meters, and the actual completion is 800 square meters, the progress lag rate is 20%.

[0065] S103: calling the progress lag rate of the construction link, determining the resource type of the lagging link, identifying the proportion of the resource type in the lagging link, evaluating the impact of the resource on the progress lag, and obtaining the task progress offset;

[0066] To judge the resource type of the lagging link, first identify the main resource types used in the lagging link. For example, a certain construction link mainly relies on resources such as steel bars, concrete, and mechanical equipment. The proportion of each resource type in the lagging link is counted. The proportion is calculated by the ratio of the actual consumption of each resource to the total consumption of the link. For example, if in a certain lagging link, the steel bar consumption is 500 kg, the concrete consumption is 300 kg, and the total resource consumption is 1,000 kg, then the steel bar accounts for 50% and the concrete accounts for 30%. The impact of resource types on progress delays will be evaluated. For example, if the insufficient supply of steel bars in the lagging link causes the overall progress to be delayed, the impact of steel bars will be evaluated as high. According to the evaluation results, the progress offset can be further adjusted, and the progress can be recovered and adjusted by optimizing resource scheduling and improving resource supply efficiency, and finally the progress offset of the task is obtained.

[0067] Specifically, if Figure 3 As shown in the figure, the steps of critical path progress offset value are as follows:

[0068] S201: calling the task progress offset, identifying the task dependency in the BIM model, analyzing the order of tasks, selecting task combinations that meet the dependency rules, forming multiple construction paths, calculating the total duration of the paths, and obtaining the duration value of the construction paths;

[0069] Identify task dependencies in the BIM model by calling the progress offset. Task dependencies refer to the situation where certain tasks must rely on the completion status of other tasks before they can be completed. For example, concrete pouring work must be carried out after the foundation is completed. Analyze the sequence of tasks before and after, which means comparing the start and end times of different tasks to ensure that the execution sequence conforms to the actual construction process. Calculate the start time and end time of each task, determine whether there is time overlap or incorrect sequence, and adjust such errors. Filter out task combinations that meet the dependency rules. This process means finding a suitable task sequence in the task dependencies to ensure that the dependencies between tasks are observed. The filtered task combinations will form multiple construction paths, and the paths represent different construction strategies or schedules. For each construction path, calculate the total path duration, that is, add up the durations of all tasks in the path. For example, if a path contains 3 tasks, the duration of task 1 is 2 days, the duration of task 2 is 3 days, and the duration of task 3 is 4 days, then the total duration of this path is 9 days. Obtain the construction path duration values, thus providing different selection options for the construction project.

[0070] S202: Based on the construction path duration values, filter out the paths with long durations, lock the task nodes, calculate the progress offset of the path task nodes, detect the offset situation of the tasks, calculate the offset amplitude of the tasks on the critical path, count the total task offset, analyze the impact of the offset on the total duration, and obtain the critical path progress offset value;

[0071] The critical path progress offset value, using the formula:

[0072]

[0073] where, ΔP k represents the progress offset value of the k-th critical path, T i,k represents the current progress time of task i on the critical path k, T i,k-1 represents the progress time of task i on the critical path k in the previous calculation, C k represents the average duration of task i on the critical path k, and n represents the total number of tasks on the critical path k;

[0074] Parameter description:

[0075] ΔP k : The offset amplitude of the k-th critical path, indicating the overall deviation degree of the task progress on the critical path;

[0076] T i,k : The current progress time of the i-th task on the critical path k, and this value is obtained by monitoring and recording the actual completion time of the task;

[0077] T i,k-1: The progress time of the $i$-th task on the critical path $k$ in the previous calculation. This value is stored in the project management system and reflects the previous plan or real-time progress;

[0078] C k : The average duration of all tasks on the critical path $k$. The calculation method is:

[0079] where $D$ i,k is the planned duration of the $i$-th task on the critical path $k$, $n$ is the total number of tasks on the critical path $k$, and the planned duration $D$ i,k is calculated through expert estimation, historical data analysis, or the three-point estimation method;

[0080] Calculate the progress offset of each task: $\Delta T$ i,k $= |T$ i,k $- T$ i,k-1 $|$;

[0081] Calculate the normalized offset of each task:

[0082] where the denominator $T$ i,k-1 $+ C$ k is used to normalize the offset, taking into account the previous progress and average duration of the task to balance the impact between different tasks;

[0083] Calculate the sum of the squares of the normalized offsets of all tasks:

[0084] Take the square root to obtain the offset amplitude of the critical path:

[0085] Suppose there are 3 tasks on a certain critical path, and the data is as follows:

[0086] The 1st task: The current progress time $T$ 1,k $= 12$ days, the previous progress time $T$ 1,k-1 $= 10$ days, and the planned duration $D$ 1,k $= 15$ days;

[0087] The 2nd task: The current progress time $T$ 2,k $= 8$ days, the previous progress time $T$ 2,k-1 $= 9$ days, and the planned duration $D$ 2,k $= 12$ days;

[0088] The 3rd task: The current progress time $T$ 3,k $= 14$ days, the previous progress time $T$ 3,k-1 $= 13$ days, and the planned duration $D$ 3,k $= 14$ days;

[0089] Calculate the average duration:

[0090] Calculate the progress offset of each task:

[0091] ΔT 1,k = |12 - 10| = 2;

[0092] ΔT 2,k = |8 - 9| = 1;

[0093] ΔT 3,k = |14 - 13| = 1;

[0094] Calculate the normalized offset of each task:

[0095]

[0096] Calculate the sum of squares of the normalized offsets: S k = 0.087 2 + 0.046 2 + 0.036 2 ≈ 0.010 + 0.002 + 0.001 = 0.013;

[0097] Calculate the offset amplitude of the critical path:

[0098] This result indicates that the overall deviation degree of the task progress on the critical path is 0.114. The larger this value is, the greater the degree of deviation of the task progress from the plan, and the project manager needs to pay attention and take corrective measures.

[0099] Specifically, as Figure 4 shown, the steps of the impact degree of resource shortage are specifically as follows:

[0100] S301: Based on the progress offset value of the critical path, analyze the planned progress, actual progress and offset, identify the fluctuations in construction resource requirements, and obtain the value of construction resource requirement fluctuations;

[0101] First, it is necessary to analyze the differences among the planned progress, the actual progress, and the offset. The planned progress refers to the progress of each task scheduled according to the initial construction arrangement, while the actual progress is the progress of the tasks actually completed during the current construction. The progress offset is the gap between the actual progress and the planned progress. For example, if the planned completion time of a construction task is 5 days and the actual completion time is 6 days, then the progress offset of this task is 1 day. By comparing and analyzing the data, the fluctuations in the construction resource requirements can be identified. When the task progress lags or advances, it will directly affect the resource requirements. For example, if the completion of a task is delayed, more construction resources such as workers or construction machinery and equipment will be needed. If the task is completed ahead of schedule, it will result in a waste of resources. By analyzing the progress offset of each task, the fluctuations in the resource requirements during the construction process can be identified, and then the resource requirement fluctuation value can be obtained. The fluctuation value reflects the changes in the resource requirements during the actual implementation of the construction project, providing a basis for subsequent resource allocation.

[0102] S302: Based on the construction resource requirement fluctuation value, call the data of the inventory quantity, the on-site consumption quantity, and the supply chain delivery quantity, screen the resource categories with inventory lower than the demand quantity and the shortage quantity, identify the severity of the resource shortage, and analyze the changing trend of the resource shortage in combination with the resource consumption rate to obtain the resource shortage quantity;

[0103] The data of the inventory quantity, the on-site consumption quantity, and the supply chain delivery quantity will be called for screening operations to identify the resource categories with inventory lower than the demand quantity and their shortage quantities. For example, through inventory management, obtain the current material inventory quantity, and in combination with the actual consumption quantity at the construction site and the predetermined resource demand quantity, judge which resource categories are in shortage. Suppose the demand quantity of steel is 1000 tons, the actual on-site consumption quantity is 800 tons, but the inventory is only 300 tons left, then the shortage quantity of steel is 700 tons. The severity of the resource shortage will be evaluated. The severity of the shortage can be determined by calculating the ratio of the resource demand quantity to the inventory quantity. If this ratio is high, it indicates that the shortage is relatively severe. For example, the shortage ratio of steel is 700 tons / 300 tons = 2.33, indicating a severe shortage. Analyze the changing trend of the resource shortage in combination with the resource consumption rate. For example, if the consumption rate of steel is 50 tons per day and the shortage quantity is 700 tons, then this resource will be completely short in 14 days. By analyzing the changing trend, the duration and scope of the resource shortage can be accurately predicted, and thus the resource shortage quantity can be obtained. The project manager can take countermeasures in advance and adjust the resource allocation strategy.

[0104] S303: Call the resource shortage quantity, analyze the affected construction tasks, calculate the project duration delay time of the tasks, judge the impact of the resource shortage on the construction progress, and obtain the resource shortage impact degree;

[0105] The project duration delay time of the task adopts the formula:

[0106]

[0107] Among them, ΔT delay represents the construction period delay time of the task, and R shortage represents the resource shortage quantity, and C task represents the resource quantity required for the construction task, and C available represents the available resource quantity, and T task represents the actual construction period of the task, and T estimated represents the estimated construction period of the task, and D e represents the e-th influencing factor, and m represents the total number of influencing factors;

[0108] R shortage represents the resource shortage quantity, indicating the actual shortage of current resources. This value is obtained through real-time monitoring by the resource scheduling system. Based on the actual consumption and supply of various resources in the project, it is specifically calculated by "actual resource consumption - expected resource supply". Assuming that the resource quantity required in the project is 1000 units and the current available resources are 800 units, the resource shortage quantity R shortage = 1000 - 800 = 200 units;

[0109] C task represents the resource quantity required for the construction task. This value is obtained through detailed task decomposition and resource requirement analysis in the project plan. The quantification process involves the specific requirements and scheduling arrangements of the task stage, and data is sorted through construction drawings, resource scheduling tables, etc. Assuming that the resource quantity required for this task is 1000 units;

[0110] C available represents the available resource quantity, and the data is obtained through on-site resource inventory checks and monitoring by the on-site real-time scheduling system. Assuming that the on-site available resource quantity is 800 units;

[0111] T task represents the actual construction period of the task, and this value is obtained through the actual execution time of the task recorded in the project management system. Assuming that the actual construction period of this task is 50 days;

[0112] T estimated represents the estimated construction period of the task, and the value is given in the construction period plan at the initial stage of the project. Assuming that the estimated construction period is 40 days;

[0113] represents the cumulative impact of various resource shortage factors affecting the construction task progress on the task. Each influencing factor D e is calculated from the impact on various resource shortages, specifically factors such as equipment shortage and material shortage. The quantification of the influence degree is estimated through expert experience or historical data. Assuming that the total influence factor of the resource shortage causing the construction period to increase is 10 days;

[0114] Calculated resource shortage quantity: R shortage = C task - C avai lable = 1000 - 800 = 200;

[0115] Calculate the absolute value of the difference between the actual construction period and the estimated construction period: |T task - T estimated | = |50 - 40| = 10;

[0116] Calculate the sum of the impact factors:

[0117] Substitute the above values into the formula for calculation:

[0118]

[0119] The result shows that the construction task affected by resource shortage is delayed by approximately 8944.3 unit times. The unit time here will be adjusted according to the duration unit of the specific project. In this example, if the unit time is days, it means that this task will be delayed by approximately 8944.3 days in the project schedule. This calculation result reflects that due to the gap between the resource shortage quantity and the resources required for the task, as well as the combined effect of the influencing factors, the severity of the construction task delay has exceeded the initial expectation. Therefore, it is necessary to adjust the resource scheduling and construction period arrangement to ensure that the project schedule is not more affected.

[0120] Specifically, as Figure 5 shown, the steps of the resource scheduling priority sequence are specifically as follows:

[0121] S401: Invoke the resource shortage impact degree, screen the resource scheduling in the construction tasks, analyze the degree of resource occupancy overlap between tasks, and obtain the resource scheduling conflict task pairs;

[0122] First, it is necessary to screen the resource scheduling in the construction tasks. By identifying which construction tasks require the same type of resources to complete and the tasks overlap in time, view the resource requirements of each task and compare them with the resource requirements of other tasks to find the tasks with conflicting resource requirements in the same time period. For example, if Task A and Task B both require concrete resources and their construction times overlap, then there is a resource scheduling conflict between these two tasks. The degree of resource occupancy overlap between tasks will be analyzed, and the degree of overlap will be obtained by calculating the overlapping time period and resource quantity. If Task A requires 5 tons of concrete and Task B requires 8 tons, and their construction times overlap for 3 days, then the resource occupancy within these 3 days will be considered overlapping, and the quantity of concrete consumed by each task within these 3 days will be recorded in detail to obtain the resource scheduling conflict task pairs, providing a reference for subsequent resource allocation and scheduling.

[0123] S402: Based on the resource scheduling conflict task pairs, analyze the urgency degree of the tasks, extract the duration offset, remaining duration and the logical relationship between tasks, judge the critical tasks affected by resource shortage, screen the resource requirement occupancy in the critical tasks, determine the priority order of the critical tasks according to the resource requirement intensity, adjust the allocation order of resources among the critical tasks, and obtain the critical task resource allocation sequence;

[0124] The urgency degree of the tasks is evaluated by calculating the remaining duration of the tasks and the current construction progress. For example, assume that the remaining duration of task C is 4 days, while the remaining duration of task D is 1 day. Then the urgency degree of task D is significantly higher. The duration offset, remaining duration and the logical relationship between tasks will be extracted to ensure that the order and dependencies of the tasks are observed. The duration offset refers to whether the completion time of the task has changed compared with the original plan. Calculate the offset for each task. Assume that the original planned completion time of task C is 3 days, but due to resource shortage, it actually takes 5 days to complete. Such an offset is 2 days. Judge which tasks are affected by resource shortage, especially identify the critical tasks. The tasks play an important role in the completion time of the project. Screen the resource requirement occupancy in the critical tasks. The specific operation is to compare the resources required by the critical tasks with the existing resources to identify the tasks with large resource requirements and significant impact on the project progress. Based on the resource requirement intensity, determine the priority order of the tasks. For example, if the resource requirement of task E is 1000 tons of steel, while the requirement of task F is 500 tons of steel, task E will have a higher priority. Adjust the allocation of resources among the critical tasks according to the priority order to ensure that the high-priority tasks are allocated resources first, thus obtaining the critical task resource allocation sequence.

[0125] S403: Invoke the critical task resource allocation sequence, adjust the resource supply order according to the task priority, combine with the logical relationship of the construction tasks, sort the execution order of the tasks, and obtain the resource scheduling priority sequence;

[0126] According to the priority order of the tasks, adjust the order of resource allocation so that the high-priority tasks can be preferentially supported by resources in the case of limited resources. For example, if the priority of task G is 1 and the priority of task H is 2, and both require the same mechanical equipment resources, the mechanical equipment will be preferentially allocated to task G. Combine with the logical relationship of the construction tasks, sort the execution order of the tasks to ensure that the dependencies between tasks are met. For example, if task I depends on the completion of task J, then task J must be executed first. Automatically adjust the execution order of the tasks according to the logical relationship. Generate the resource scheduling priority sequence according to the task priority and the order of resource supply. The sequence will guide how to reasonably allocate resources at the construction site, avoid resource conflicts, and ensure the completion of construction tasks on time.

[0127] Specifically, as Figure 6 shown, the steps for adjusting the construction resource scheduling are specifically as follows:

[0128] S501: Invoke the resource scheduling priority sequence, extract the available status data of construction tower cranes and concrete mixing plants, analyze the equipment idle duration and the current task occupancy, and screen the available equipment that meets the scheduling conditions to obtain a list of schedulable equipment;

[0129] First, extract the available status data of equipment such as construction tower cranes and concrete mixing plants. The data is obtained in real time through equipment management and includes the current status, usage time, and scheduled available time of the equipment. For example, the available time of a certain tower crane is 8 hours, and the available time of another tower crane is 12 hours. Analyze the equipment idle duration and the current task occupancy. The specific operation is to check the current usage time of the equipment and calculate the idle duration of the equipment. For example, if tower crane A has been used for 10 hours in the past 12 hours, its idle duration is 2 hours. The available equipment that meets the scheduling conditions will be screened. This screening process is judged by comparing the idle time of the equipment with the task demand time. For example, if task X requires the use of a tower crane for 4 hours, and tower crane A has 2 hours of idle time and tower crane B has 8 hours of idle time, then tower crane B meets the scheduling conditions and is therefore included in the list of schedulable equipment. Through a series of analyses, a list of schedulable equipment is obtained to guide the allocation and use of the equipment.

[0130] S502: Based on the list of schedulable equipment, screen the standby resources that meet the scheduling conditions, analyze the resource adaptability, match the delivery cycle of the resource supply chain, screen the resources that meet the scheduling requirements, and determine the allocation order of the resources according to the resource supply and demand matching degree to obtain a building resource matching sequence;

[0131] Screen for standby resources that meet the scheduling conditions. This screening process evaluates the existing inventory, performance, adaptability, and schedulable time of standby resources. For example, based on the model, capabilities, and construction requirements of the equipment, determine whether it meets the needs of the current task. If some standby resources do not meet the task requirements, eliminate them, and the remaining ones will be further analyzed for adaptability to ensure that the resources can match the task requirements. Compare the technical parameters, functions, working hours, etc. of the resources with the construction task requirements for adaptability assessment. Suppose task Y requires a mechanical equipment that can carry 10 tons of materials, and there are two alternative devices. One device can only carry 8 tons, and the other can carry 12 tons. Select the latter and match the delivery cycle of the resource supply chain, evaluating the time required for the resource to reach the construction site from the supplier. For example, if the supply cycle of a certain resource is 2 days and there is only 1 day left until the start time of the task, the system will determine that the resource cannot meet the demand in time. Determine the allocation order of resources based on the resource supply-demand matching degree. By analyzing the supply situation of each resource and the demand situation of the task, determine the priority resource category to be allocated. For example, if the supply of a certain resource is sufficient and the demand is strong, then this resource will be allocated first. Generate a building resource matching sequence to ensure that resources can be scheduled in order according to task requirements.

[0132] S503: Invoke the building resource matching sequence, adjust the resource scheduling order according to the construction task priority, and perform building resource scheduling adjustment in combination with the task execution requirements;

[0133] First, arrange the resource scheduling order according to the priority of the task. For example, if the priority of task A is higher than that of task B, resources will be scheduled for task A first. Combine the execution requirements of each task to adjust the resource scheduling. This adjustment operation needs to consider the specific types and quantities of resources required for each task, as well as the actual availability of the resources. For example, if task A requires 10 tons of cement and task B requires 5 tons of cement, and the cement inventory is 15 tons, 10 tons of cement will be allocated to task A first, and the remaining 5 tons of cement will be allocated to task B. This process takes into account the actual supply of resources and the urgency of the tasks to ensure the optimal utilization of resources. Perform building resource scheduling adjustment to ensure that all tasks can proceed smoothly and there will be no over-scheduling or conflicts of resources, and a reasonable resource scheduling plan can be generated to ensure that the construction tasks are completed on time and the resources are utilized efficiently.

[0134] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A BIM-based optimization method for construction project resource scheduling, characterized in that It includes the following steps: S1: Based on the current progress status of the construction task, collect the consumption of construction personnel, mechanical equipment, and materials, compare the planned task progress with the real-time progress, screen the construction links with lagging task progress, judge the resource type, and establish the task progress offset; S2: Call the task progress offset, identify the task dependencies in the BIM model, screen to form the construction path, calculate the total duration of the path, screen the path with a long duration, detect the task progress offset on the path, and establish the critical path progress offset value; S3: Call the critical path progress offset value, analyze and monitor the usage of steel bars, formwork, and concrete pump trucks, evaluate the resource requirements of the construction task, compare the current inventory, on-site consumption, and supply chain delivery volume, screen the resources with inventory lower than the demand, identify the number of affected tasks and the delay time, and obtain the resource shortage impact degree; S4: Call the resource shortage impact degree, screen the task pairs with resource scheduling conflicts, analyze the urgency of the duration of each task, screen the critical tasks affected by the resource shortage, adjust the resource allocation order, and output the resource scheduling priority sequence.

2. The BIM-based building project resource scheduling optimization method according to claim 1, wherein The task progress offset includes the progress difference value, resource consumption deviation, and construction link lag degree. The critical path progress offset value includes the critical task delay amount, path total float, and construction stage progress offset. The resource shortage impact degree includes the number of affected tasks, delay time, and resource supply-demand difference value. The resource scheduling priority sequence includes the duration urgency, resource requirement level, and task conflict intensity.

3. The BIM-based building project resource scheduling optimization method according to claim 1, characterized in that The steps of the task progress offset are specifically as follows: S101: Based on the current progress status of the construction task, collect the working hours of construction personnel, the running duration of mechanical equipment, and the material consumption, identify the cumulative resource usage, compare with the planned consumption value, determine the resource consumption deviation, and obtain the resource consumption deviation value; S102: Based on the resource consumption deviation value, identify the task completion ratio, determine the construction link progress offset, screen the construction links with lagging task progress, analyze the lag amplitude of the link, and obtain the construction link progress lag rate; S103: Call the construction link progress lag rate, judge the resource type of the lagging link, identify the proportion of the resource type in the lagging link, evaluate the degree of influence of the resource on the progress lag, and obtain the task progress offset.

4. The BIM-based building project resource scheduling optimization method according to claim 1, characterized in that The steps of the critical path progress offset value are specifically as follows: S201: Call the task progress offset, identify the task dependencies in the BIM model, analyze the front-back order between tasks, screen the task combinations that meet the dependency rules, form multiple construction paths, calculate the total duration of the path, and obtain the construction path duration value; S202: Based on the construction path duration value, screen the path with a long duration, lock the task nodes, calculate the progress offset of the path task nodes, detect the offset situation of the tasks, calculate the offset amplitude of the tasks on the critical path, count the total task offset, analyze the influence of the offset on the total duration, and obtain the critical path progress offset value.

5. The optimization method for building project resource scheduling based on BIM according to claim 4, wherein The critical path progress offset value adopts the formula: Among them, ΔP k represents the progress offset value of the k-th critical path, T i,k represents the current progress time of task i on critical path k, T i,k-1 represents the progress time of task i on critical path k during the previous calculation, C k represents the average duration of tasks on critical path k, and n represents the total number of tasks on critical path k.

6. The BIM-based building project resource scheduling optimization method according to claim 1, wherein, The steps of the resource shortage impact degree are specifically as follows: S301: Based on the critical path schedule deviation value, analyze the planned schedule, the implemented schedule, and the deviation amount to identify the fluctuations in construction resource requirements, and obtain the construction resource requirement fluctuation value; S302: Based on the construction resource requirement fluctuation value, call the data of inventory quantity, on-site consumption quantity, and supply chain delivery quantity, screen the resource categories with inventory lower than the demand and the shortage quantity, identify the severity of resource shortage, and analyze the change trend of resource shortage in combination with the resource consumption rate to obtain the resource shortage quantity; S303: Call the resource shortage quantity, analyze the affected construction tasks, calculate the number of tasks and the project duration delay time, and judge the impact of resource shortage on the construction schedule to obtain the resource shortage impact degree.

7. The BIM-based building project resource scheduling optimization method according to claim 6, wherein, The formula for the project duration delay time of the task is: Among them, ΔT delay represents the construction period delay time of the task, R shortage represents the resource shortage quantity, C task represents the resource quantity required for the construction task, C available represents the available resource quantity, T task represents the real-time construction period of the task, T estimated represents the estimated construction period of the task, D e represents the e-th influencing factor, and m represents the total number of influencing factors.

8. The BIM-based building project resource scheduling optimization method according to claim 1, wherein The steps of the resource scheduling priority sequence are specifically as follows: S401: Call the resource shortage impact degree, screen the resource scheduling in the construction tasks, analyze the overlapping degree of resource occupation among the tasks, and obtain the resource scheduling conflict task pairs; S402: Based on the resource scheduling conflict task pairs, analyze the project duration urgency of the tasks, extract the project duration deviation amount, the remaining project duration, and the logical relationship among the tasks, judge the critical tasks affected by resource shortage, screen the resource requirement occupation amount in the critical tasks, determine the priority order of the critical tasks according to the resource requirement intensity, and adjust the allocation order of resources among the critical tasks to obtain the critical task resource allocation sequence; S403: Call the critical task resource allocation sequence, adjust the resource supply order according to the task priority, and combine the logical relationship of the construction tasks to sort the execution order of the tasks to obtain the resource scheduling priority sequence.

9. The BIM-based building project resource scheduling optimization method according to claim 1, wherein The method further includes step S5: S5: Based on the resource scheduling priority sequence, identify the available status of construction tower cranes and concrete mixing plants, screen the standby resources that meet the scheduling conditions, match the delivery cycle of the resource supply chain, and execute the adjustment of building resource scheduling; The adjustment of building resource scheduling includes the equipment allocation plan, the material scheduling strategy, and the supply chain delivery plan.

10. The BIM-based building project resource scheduling optimization method according to claim 9, wherein, The steps of the adjustment of building resource scheduling are specifically as follows: S501: Call the resource scheduling priority sequence, extract the available status data of construction tower cranes and concrete mixing plants, analyze the idle duration of the equipment and the current task occupation situation, and screen the available equipment that meets the scheduling conditions to obtain the list of schedulable equipment; S502: Based on the list of schedulable equipment, screen the standby resources that meet the scheduling conditions, analyze the resource adaptability, match the delivery cycle of the resource supply chain, screen the resources that meet the scheduling requirements, and determine the allocation order of the resources according to the resource supply and demand matching degree to obtain the building resource matching sequence; S503: Call the building resource matching sequence, adjust the resource scheduling order according to the construction task priority, and combine the task execution requirements to execute the adjustment of building resource scheduling.

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