The quantitative value of R-square and the residual plots are employed as the criterions. 相關係數值和殘差分布圖被用為選擇之標準。
A causal residual generator is obtained by making use of the ununiqueness of the optimal solutions to the minimization problem. 然後,利用該最小化問題解不唯一的特點,求得滿足因果關係的最優殘差產生器。