Aiming at the issues that the bottleneck identification is difficult and the bottleneck identification is not global and effective after bottleneck drift for job-shop network in disturbance environment
a new web-based manufacturing multi-bottleneck identification method is presented. A network model of job-shop is established according to multiple levels of production data
such as equipment and tooling
process route
logistics path
product configuration
etc. The kinetic equations of job-shop network are established
and the criterion of transfer of disturbance factors is thus obtained. Expending bottlenec
k connotation
a bottleneck identification strategy is proposed based on CML method. By comprehensively considering the characteristics of dynamic node itself
network topological structure and propagation mechanism of disturbance in the network
continuous quantitative description and prediction of job-shop bottlenecks are realized. An example for dynamically monitoring and forecasting the bottleneck in a job shop verifies the validation and practicability of the proposed method. The results show that in disturbance environment
CML model can better predict the trend of the bottleneck degree of the workstations. The average bottleneck degree of workstation R
1
is 1.12 and the bottleneck lasts for 40 h
and the average bottleneck degree of workstation R
3
is 1.05 and the bottleneck lasts for 10 h. Workstations R
1
and R
3
become the first bottleneck of the system
along with the progress of the process workstations R
1
and R
24
alternately become the system bottleneck.
关键词
Keywords
references
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