Evaluating the Performance of Synthetic Double Sampling np Chart Based on Expected Median Run Length

To keep an eye on the status of high-quality processes for fraction nonconforming, synthetic double sampling (SDS) np chart is a helpful tool. The SDS hybrid between (DS) and conforming run length (CRL) chart. performance control typically judged solely using average (ARL). However, as shape (RL) distribution varies with magnitude shift in process ARL no longer provides clear interpretation chart’s performance. Subsequently, enhanced DS charts that use median (MRL) expected (EMRL) measures, including MRL have recently been proposed addressing this setback. broaden functionality np, work, unexplored EMRL alternative measure developed by means Markov chain model. Additionally, both zero-state (ZS) steady-state (SS) modes, novel optimal designs algorithms are described computing charting parameters chart, MRL1 EMRL1 minimizations, without any unfavourable feature bilateral sensitivity. Both performances compared. Optimal sensitivity analyses provided to aid practical application