A Multivariate Functional CUSUM Control Chart for High-Dimensional Process Monitoring: Application to Air Quality
This study proposes a multivariate functional CUSUM (MFCUSUM) control chart for Phase II monitoring of high-dimensional multivariate functional data. The proposed framework combines B-spline smoothing, multivariate functional principal component analysis (MFPCA), whitening transformation, and CUSUM accumulation, with c...