Quality-Related Process Monitoring Based on Total Kernel PLS Model and Its Industrial Application

Table 2

Monitoring statistics and control limits.

Statistic	Calculation	Control limit
𝑇^2𝑦	𝐭^𝑇𝑦newΛ𝑦^−1𝐭𝑦new	𝐴𝑦𝑛^2−1𝑛𝑛−𝐴𝑦𝐹𝐴𝑦,𝑛−𝐴𝑦,𝛼
𝑇^2𝑜	𝐭^𝑇𝑜newΛ𝑜^−1𝐭𝑜new	𝐴𝑜𝑛^2−1𝑛𝑛−𝐴𝑜𝐹𝐴𝑜,𝑛−𝐴𝑜,𝛼
𝑇^2𝑟	𝐭^𝑇𝑟newΛ𝑟^−1𝐭𝑟new	𝐴𝑟𝑛^2−1𝑛𝑛−𝐴𝑟𝐹𝐴𝑟,𝑛−𝐴𝑟,𝛼
𝑄𝑟	𝜙𝑟𝑟𝐱new^2	𝑔𝜒^2ℎ,𝑎