OpenChainGraph Suite · ART-458 · SOX 404 / ICFR Control Testing
Attribute Sampling Plan Generator
Computes a sample size from confidence level, tolerable deviation rate, and expected deviation rate using the standard zero-EDR Poisson attribute-sampling formula (with an expansion factor for nonzero EDR). Item selection is deterministic interval sampling over a declared population hash — no randomness, so any auditor can replay the identical sample from the identical declared inputs. If the tolerable rate is at or below the expected rate, the plan is statistically indefensible and the tool falls back to a full-population census rather than a bad plan.
🔒 All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data — use synthetic or anonymised inputs only.
⚠ This tool performs no random sampling. Item selection is a pure function of population size and your declared population hash, so the same inputs always yield the same sample.
Sampling Plan Inputs
Confidence level
Population size
Tolerable deviation rate (%)
Expected deviation rate (%)
Population hash (identifies the sorted, extracted population)