Research on Release Control Policies of Parallel Semiconductor Production lines

With the expansion of the manufacturing scale and the rise of the collaborative manufacturing, the release control policy of parallel semiconductor production lines has been paid attention to. In this paper, we propose two kinds of release control strategies for the parallel semiconductor production lines respectively based on utility of primary bottleneck workstation and primary processing area, in order to solve the problem of the reasonable distribution between the production lines for each job. Comparing to common release control strategy CONWIP (Constant Work in Process), the release control policies can increase the throughput, and improve the on-time delivery. The simulation results of the former policy demonstrate that the throughput(TH), on-time delivery rate(ODR) and on-time delivery rate of hot job(HODR) are increased by 1.44%, 18.66%, 12.17%. Moreover, the mean cycle time(CT) is decreased by 10.95%. The simulation results of the latter policy demonstrate that TH, ODR, HODR are increased by 2.47%, 19.75% and 17.07%. Moreover, CT is decreased by 11.58%.