This standard is applicable to the quality control of the continuous production process when the quality index to be inspected is the number of unqualified products or the number of defects in the sample.
2006GB/Z 4887-2006 Cumulative Sum charts. Guidance on quality control and data analysis using CUSUM techniques
1985GB/T 4887-1985 Cusum charts for counted/attributes data
GB/T 4887-1985 Cusum charts for counted/attributes data was changed to GB/Z 4887-2006 Cumulative Sum charts. Guidance on quality control and data analysis using CUSUM techniques.