Chunzhi Li (East China Jiao Tong University) – The improvement of the continuous sampling plan for the in-line process

In order to solve the problem that the continuous sampling plan (CSP) could only meet the quality constraint and delayed the termination for the deteriorating process, we proposed two improving schemes, the optimal continuous sampling plan (OCSP) and the integrated process control scheme between CSP and the process yield index Spk. OCSP identifies the sole optimal scheme parameters for the specified in-line process based on the estimator of the conformance rate, terminating the deteriorating process with the effective working interval determined by the quality requirement. The integrated process control scheme could simultaneously satisfy four constraints, quality, cost, and two types of risk, and stop the worse process with the risk control strategy, which is suitable to the scenario with limit inspection capability.