- 期刊
Throughput Analysis Using Alternating Renewal Process in Balanced Serial Production Lines with No Interstage Buffers
應用替代更新過程模式于無暫存區串聯製程產能分析之研究
摘要
This paper presents a closed form method with exponential function to calculate performance measures, such as expected value and variance of the transient throughput, and the probability that measures the delivery in time for a balanced serial production with no interstage buffers. Such approach is based on the assumptions that 1) each machine alternates between Normal and Failed, 2) up times and down times are i.i.d. (but with exponential distributions required in closed form method) and 3) all machines have the same production rate μ. Numerical experiments that compare values of such performance measures by different methods are presented in terms of a balanced serial production with no interstage buffer cited from literature. The results were found that: for T＞10, both E(π(subscript T)) and Var(π(subscript T)) increase by decreasing α(1/MTTF). That is, it seems to indicate that the system performance can not be improved by choosing smaller α. On the contrary, we can achieve that both E(π(subscript T)) increases and Var(π(subscript T)) decreases by increasing β(1/MTBF).
並列摘要
This paper presents a closed form method with exponential function to calculate performance measures, such as expected value and variance of the transient throughput, and the probability that measures the delivery in time for a balanced serial production with no interstage buffers. Such approach is based on the assumptions that 1) each machine alternates between Normal and Failed, 2) up times and down times are i.i.d. (but with exponential distributions required in closed form method) and 3) all machines have the same production rate μ. Numerical experiments that compare values of such performance measures by different methods are presented in terms of a balanced serial production with no interstage buffer cited from literature. The results were found that: for T＞10, both E(π(subscript T)) and Var(π(subscript T)) increase by decreasing α(1/MTTF). That is, it seems to indicate that the system performance can not be improved by choosing smaller α. On the contrary, we can achieve that both E(π(subscript T)) increases and Var(π(subscript T)) decreases by increasing β(1/MTBF).