Research On Multi-project Production Scheduling Of Fabricated Buildings Based On Component Supplier

The development of assembly building meets the needs of transformation and upgrading of the construction industry.Promoting assembly building vigorously is the development trend of the future construction industry.With the increase of the scale of assembly building construction,the order of prefabricated component suppliers has also increased dramatically.The supply mode of prefabricated component suppliers has gradually changed from supplying single assembly building project to supplying multiple assembly building projects at the same time.Therefore,how the supplier of prefabricated components can make full use of its limited resources to realize the timely delivery of multiple orders is an urgent problem to be solved.Some domestic scholars have studied single-project multi-space collaborative scheduling problem and multi-project multi-supplier distributed collaborative scheduling problem in deterministic and uncertain environments.However,the production mode of single component factory supplying single project and multicomponent factory supplying single project at present does not accord with the actual situation of current prefabricated component supply;some foreign scholars have studied earlier.The production scheduling problem of prefabricated components has been solved,but because foreign prefabricated components have achieved standardized production and mass customization,the research theory,research model and research methods of production scheduling of manufacturing specialty can be directly used for reference.However,the development of assembly building in China is not yet mature,the supplier of prefabricated components has not reached the annual capacity of design,and the design standardization of prefabricated components has not been achieved.Therefore,it is difficult to draw directly on foreign research results.In view of this,according to the actual situation of China's assembly development,it has certain theoretical and practical significance to study the production scheduling problem of single component factory supplying multiple assembly construction projects.Taking the supplier of prefabricated components as the research object,this paper studies how to optimize the order combination of multiple assembled construction projects arriving at the same time with the best efficiency by utilizing its own production capacity,formulate the order scheduling plan,and carry out multi-project component production scheduling.This paper is based on the idea of "scheduling conceptual model-core scheduling technology-scheduling model construction-Empirical analysis".Firstly,the conceptual models of order combination optimization based on decision-making level and multi-component and multi-pipeline scheduling based on workshop level are constructed.By proposing order combination optimization technology based on residual production capacity of production line,virtual time window transformation technology based on assembly space and order virtual scheduling center transformation technology based on production space,the assembly building multi-project is realized.Component production scheduling problem is transformed into virtual order multi-pipeline production scheduling problem for prefabricated components.A multi-project component production scheduling model is established and an empirical analysis is carried out.The results show that the scheduling method can effectively optimize the order combination of multi-project components,rationally arrange the production plan of multi-project components,and rationally allocate the limited resources of production lines,thus providing support information for the management decision of suppliers of prefabricated components.