A study on the variable sampling interval EWMA $\bar{X}$ chart when the process parameters are unknown

L V OngW L TeohM B C KhooZ L ChongW C Yeong2025-01-062025-01-062018-1110.1088/1742-6596/1132/1/012084https://dspace-cris.utar.edu.my/handle/123456789/10455A study on the variable sampling interval EWMA $\bar{X}$ chart when the process parameters are unknownjournal-article