A balancing approach for mixed model assembly line based on GA&SA

To be an efficient assembly line form, the line balancing and sequencing will be the key problem. Based on the analysis of the mixed model assembly U line design and the assembly process of the different auto bumpers, mixed model U line with fixed or alterable stations is introduced after the forecast of the fluctuating long term demand. The target of the design solution is to minimum the fluctuation of the assembly time spent in the different stations comparing with the equivalent cycle time. A sequencing model was designed aiming at the minimum cost of the otiose and overloading after thoroughly researching in the mixed model assembly line balancing and sequencing methods. An improved genetic algorithm was developed using simulation annealing algorithms, the solution methodology has been finalized and the results was presented.