What is the value of lower cusum in the standardized scale cusum chart for process variability?
Posted: Thu Jul 14, 2022 1:54 pm
a) \(S_i^+=max\left\{0,v_i-k+S_{i-1}^+\right\}\)
b) \(S_i^-=max\left\{0,v_i-k+S_{i-1}^+\right\}\)
c) \(S_i^-=max\left\{0,-v_i-k+S_{i-1}^-\right\}\)
d) \(S_i^+=max\left\{0,-v_i-k+S_{i-1}^+\right\}\)
b) \(S_i^-=max\left\{0,v_i-k+S_{i-1}^+\right\}\)
c) \(S_i^-=max\left\{0,-v_i-k+S_{i-1}^-\right\}\)
d) \(S_i^+=max\left\{0,-v_i-k+S_{i-1}^+\right\}\)