This International Standard defines procedures for random sampling and randomization. Several methods are provided, including approaches based on mechanical devices, tables of random numbers, and portable computer algorithms.This International Standard is applicable whenever a regulation, contract, or other standard requires random sampling or randomization to be used. The methods are applicable to such situations as:a) acceptance sampling of discrete units presented for inspection in lots;b) sampling for survey purposes;c) auditing of quality management system results; andd) selecting experimental units, allocating treatments to them, and determining evalu