The plot of ANOS0 vs. h with different choices of reference value (denoted by k)
is shown in Fig. 1 for the generalized CUSUM chart. The corresponding
plots for the other two charts at l0 = 4.0, l1 = 5.0, m0 = 2.0 and m1 = 1.25m0 are shown in Fig. 2(a
and b).