本文件侧重于循环研究（RRS）的管理，可为RRS研究的范围开发、规划和执行提供指导。在进行研究之前，它可以为确定原料、机器操作、工艺控制和后处理操作提供指导。RR组织者可以在研究中确定受控和自由参数。本文件还可提供适用试验方法的选择和使用指南。RRS调查AM零件中发现的变化。研究结果可用于促进AM技术的成熟。 如本文件所述，RRS不同于实验室间比较，因为实验室间研究确定了多个用户对受控人工制品进行测量时测量方法的可变性。

This document is focused on the management of the round robin study (RRS) and can provide guidance for the scope development, planning, and execution of the RRS study. It can provide guidance to identify the feedstock, machine operations, process controls, and post-processing operations prior to running the study. RR organizers can identify controlled and free parameters in the study. This document can also provide guidance on the selection and use of test methods that can be applicable. The RRS investigates the variations found in AM parts. The outcome of the study can be used to improve the maturation of AM technologies. A RRS, as described in this document, is different from an inter-laboratory comparison because an inter-laboratory study establishes the variability in a measurement method when undertaken by multiple users on a well-controlled artefact.