描述了建筑中尺寸变化的性质及其必须量化的目的，并定义了建筑构件制造和现场工作公差评估、规范和验证中要考虑的因素。通常适用于组件和建筑，包括根据模块化协调原则设计的组件和建筑。

Describes the nature of dimensional variability in building and the purposes for which it has to be quantified, and defines the factors to be taken into account in the evaluation, specification and verification of tolerances for the manufacture of building components and for site work. Applies to components and buildings generally, including those designed in accordance with the principles of modular co-ordination.