Figure 1

The OC curves for three plans with \({{\text{L}}}_{{\text{AQL}}}\) \(CV_{AQL} = {0}{\text{.05}}\) and \({{\text{L}}}_{{\text{LTPD}}}\) \(CV_{LTPD} = {0}{\text{.06}}\). Note m = 2, m = 3 means the proposed method. Single means single sampling plan based on CV (proposed by Tong and Chen³⁴). Two stage means two stage sampling plan based on CV (proposed by Yan et al.³⁵). Repetitive means repetitive group sampling plan based on CV (proposed by Yan et al.³⁶).