本标准主要适用于计划在持续生产阶段生产的新零件和产品，但也适用于当前正在生产的零件（例如，制造、维护）。本标准适用于影响KC变化的所有生产过程，以及确定KC的维护和服务过程。它适用于组件和组件内所有级别零件的组织，包括铸件和锻件在内的基本材料，以及负责生产产品设计特性的组织。 变更控制过程从产品定义开始，通常在设计文件（例如，数字模型、工程图纸、规范）中说明，以识别KC，并导致这些KC的变更管理过程。该工艺也可用于生产商确定的KC（例如，工艺KC、附加/替代产品KC）。 生产商及其分包商负责将标准要求传达给外部供应商，这些供应商生产设计特征并提供生产和服务规定，以确保KC符合客户要求。

This standard is primarily intended to apply to new parts and products intended to be produced in an on-going production phase, but can also be applied to parts currently in production (e.g., manufacturing, maintenance). The standard is applicable to all production processes that influence the variation of KCs, as well as maintenance and service processes in which KCs are identified. It applies to organizations for assemblies and all levels of parts within an assembly, down to the basic materials including castings and forgings, and to organizations that are responsible for producing the design characteristics of the product. The variation control process begins with product definition, typically stated in the design documentation (e.g., digital model, engineering drawing, specification) which identifies KCs, and leads to a variation management process for those KCs. This process may also be used for producer-identified KCs (e.g., process KCs, additional/substitute product KCs). Producers and their subcontractors are responsible for flow down of the standard requirements to those external providers, who produce design characteristics and provide production and service provisions, to ensure that KCs conform to the customer’s requirements.