采用ISO 4120:2004提供了一个程序，用于确定两种产品的样品之间是否存在可感知的感官差异或相似性。该方法是一种强制选择过程。无论单个感官属性或多个属性存在差异，该方法都适用。

Adopts ISO 4120:2004 to provide a procedure for determining whether a perceptible sensory difference or similarity exists between samples of two products. The method is a forced-choice procedure. The method is applicable whether a difference exists in a single sensory attribute or in several attributes.