Jiu-Jun Zhang

A Comparison of Shiryaev–Roberts and Cumulative Sum Procedures for Bivariate ZIP Process Monitoring

The Zero-inflated Poisson (ZIP) model has been widely adopted in quality control for near-zero-defect processes with sporadic nonconformities, while prior research predominantly focused on univariate ZIP processes for single defect types, modern high-precision manufacturing environments often involve two or more correl...