ASD-STAN prEN 9103 P3:2022

This document 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). This document 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.