本推荐规程提供了测量摩擦材料（制动片总成和制动蹄）及其配合零件（制动盘或制动鼓）磨损的常用方法。这些磨损测量适用于根据联邦机动车安全标准（FMVSS）或欧洲共同体ECE法规安装在乘用车和轻型卡车上（车辆总重额定值不超过4536 kg）或M1类车辆（乘用车不超过九人，包括驾驶员）上的制动器。

This Recommended Practice provides a common method to measure wear of friction materials (brake pad assemblies and brake shoes) and their mating parts (brake disc or brake drum). These wear measurements apply to brakes fitted on passenger cars and light trucks up to 4536 kg of Gross Vehicle Weight Rating under the Federal Motor Vehicle Safety Standard (FMVSS), or vehicles category M1 (passenger cars up to nine occupants, including the driver) under the European Community's ECE Regulations.