ISO 4121:2003提供了描述定量反应量表（获得的反应表示感知强度）及其在评估样本时的使用的指南。 它适用于所有定量评估，无论是全球的还是具体的，无论是客观的还是享乐的。 有意将其局限于感官评估中最常用的测量量表。

ISO 4121:2003 provides guidelines describing quantitative response scales (where the response obtained indicates the intensity of perception) and their use when assessing samples. It is applicable to all quantitative assessment, whether global or specific and whether objective or hedonic. It is intentionally limited to the most commonly used measurement scales for sensory assessment.