本标准中穿插了注释/指导说明。这些说明/指导说明由标题和文本标识 斜体 . 本标准定义了一系列要求，这些要求导致特定增材制造机器有资格生产材料（参见 GN1 )符合航空航天材料规范。机器控制和/或配置类型将在下一节中讨论。业界（包括AIA和ASTM）普遍承认增材制造机器有三个资格里程碑:尽管如此，本文件将只侧重于最初的两个阶段，即: 安装资格（IQ）:提供客观证据，证明工艺设备和辅助系统安装的所有关键方面均符合增材制造零件生产商的规范，并且设备供应商的建议得到了适当考虑；这与特定的机器序列号相关联。 操作确认（OQ）:建立足够的过程控制以保持稳定的材料性能，并证明可以满足材料规格要求；这也与特定的计算机序列号相关联（请参见 GN2 ).

This standard has notes/guidance narratives interspersed throughout. These notes/guidance narratives are identified by a header and by text in italics . This standard defines a series of requirements that results in a specific AM machine qualified to produce material (see GN1 ) in compliance to an aerospace materials specification. The machine control and/or configuration types are discussed in the next sections. The industry (including AIA and ASTM) generally acknowledges that there are three qualification milestones for AM machines; nevertheless, this document will focus only on the initial two stages, namely: Installation Qualification (IQ): Producing objective evidence to show that all key aspects of the process equipment and ancillary system installation adhere to the AM Part Producer’s specification and that the recommendations of the supplier of the equipment are suitably considered; this is tied to a specific machine serial number. Operational Qualification (OQ): Establishing sufficient process control to maintain stable material performance and demonstrating that the material specification requirements can be met; this is also tied to a specific machine serial number (see GN2 ).