ISO/TR 29922:2017作为一个存储库，用于存储证明并解释ISO 6976第三版中所述方法的各种技术细节，但这些方法在标准的日常实施中并不直接需要。 每个主要条款都涉及ISO 6976:2016中描述的计算方法的一个特定方面，旨在自给自足，基本上独立于其他条款。出于这个原因，用户不应该期望整体可以作为顺序连贯的叙述进行研究。

ISO/TR 29922:2017 acts as a repository for those manifold technical details which justify and explain the methods presented in the third edition of ISO 6976 but which are not directly needed in the everyday routine implementation of the standard. Each main clause addresses a specific aspect of the calculational method described in ISO 6976:2016, and is intended to be self-sufficient and essentially independent of each other clause. For this reason, the user should not expect the whole to be accessible to study as a sequentially coherent narrative.