IS 5002 : 2024 Method for Determination of Sample Size to Estimate the Average Quality of a Lot or Process
1 SCOPE
1.1 This standard covers different methods for calculating sample size required to estimate, with a specified precision and probability level, a measure of quality for the lot or process. This measure of quality may be either the average value of the characteristic (variable data) or fraction of nonconforming items produced (attributes data) of a lot or of a process.
1.2 For determining the sample size required to estimate the quality during production process, it is assumed that production process during the time interval covered by the random sample is in state of statistical control. If the process is not in a state of statistical control, the result will not have predictive value for immediate (future) production. The practice treats the common situation where the items in the sample may be considered to exhibit a single (overall) source of variability.
2 REFERENCES
The standards given below contain provisions which through reference in this text, constitute provision of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of these standards:
| IS No. | Title |
| IS 2 : 2022 | Rules for rounding off numerical values (second revision) |
| IS 4905 : 2015/ISO 24153 : 2009 | Random sampling and randomization procedures (first revision) |