How to deal with the collaboration between task decomposition and task scheduling is the key problem of the integrated manufacturing system for complex products. With the development of manufacturing technology, we ca...How to deal with the collaboration between task decomposition and task scheduling is the key problem of the integrated manufacturing system for complex products. With the development of manufacturing technology, we can probe a new way to solve this problem. Firstly, a new method for task granularity quantitative analysis is put forward, which can precisely evaluate the task granularity of complex product cooperation workflow in the integrated manufacturing system, on the above basis; this method is used to guide the coarse-grained task decomposition and recombine the subtasks with low cohesion coefficient. Then, a multi-objective optimieation model and an algorithm are set up for the scheduling optimization of task scheduling. Finally, the application feasibility of the model and algorithm is ultimately validated through an application case study.展开更多
As building practices change,procedures that seemed indispensable at one point can be abandoned for others,one example of which is the bill of quantities(B/Q).Research into the extant literature attributes the declini...As building practices change,procedures that seemed indispensable at one point can be abandoned for others,one example of which is the bill of quantities(B/Q).Research into the extant literature attributes the declining use of B/Qs to a multitude of reasons,such as its complexity,the potentially long time required to produce it,the growth in popularity of non-traditional procurement systems,and the challenge of using the information within the document in a construction schedule.With these issues in mind,building information modeling(BIM)and virtual reality(VR)are combined and proposed as a potential solution that allows inclusion of the client into the design process.Following a literature review and precedent study,an experiment was carried out using this new process to simulate a client’s design decisions on window and interior furnishings.The choices made by the client using VR automatically updated a B/Q schedule built in Revit and allowed them to have a firm understanding of project costs.Besides giving the client more confidence in a pleasing final outcome,the technology also ensured an up-to-date,accurate,and easily understandable B/Q.The proposed method features great potential savings in cost and time and gives the B/Q a newfound importance in future construction processes.The research case presented in this paper is a stepping stone in exploring new opportunities offered by VR and BIM and how they could improve the reliability and accuracy of traditional procurement within construction,specifically within the B/Q document.展开更多
基金supported by the National Natural Science Foundation of China(71401131)the MOE(Ministry of Education in China)Project of Humanities and Social Sciences(13XJC630011)the Ministry of Education Research Fund for the Doctoral Program of Higher Education(20120184120040)
文摘How to deal with the collaboration between task decomposition and task scheduling is the key problem of the integrated manufacturing system for complex products. With the development of manufacturing technology, we can probe a new way to solve this problem. Firstly, a new method for task granularity quantitative analysis is put forward, which can precisely evaluate the task granularity of complex product cooperation workflow in the integrated manufacturing system, on the above basis; this method is used to guide the coarse-grained task decomposition and recombine the subtasks with low cohesion coefficient. Then, a multi-objective optimieation model and an algorithm are set up for the scheduling optimization of task scheduling. Finally, the application feasibility of the model and algorithm is ultimately validated through an application case study.
基金Open access funding provided by Northumbria University.
文摘As building practices change,procedures that seemed indispensable at one point can be abandoned for others,one example of which is the bill of quantities(B/Q).Research into the extant literature attributes the declining use of B/Qs to a multitude of reasons,such as its complexity,the potentially long time required to produce it,the growth in popularity of non-traditional procurement systems,and the challenge of using the information within the document in a construction schedule.With these issues in mind,building information modeling(BIM)and virtual reality(VR)are combined and proposed as a potential solution that allows inclusion of the client into the design process.Following a literature review and precedent study,an experiment was carried out using this new process to simulate a client’s design decisions on window and interior furnishings.The choices made by the client using VR automatically updated a B/Q schedule built in Revit and allowed them to have a firm understanding of project costs.Besides giving the client more confidence in a pleasing final outcome,the technology also ensured an up-to-date,accurate,and easily understandable B/Q.The proposed method features great potential savings in cost and time and gives the B/Q a newfound importance in future construction processes.The research case presented in this paper is a stepping stone in exploring new opportunities offered by VR and BIM and how they could improve the reliability and accuracy of traditional procurement within construction,specifically within the B/Q document.
