Recent developments in International Organization for Standardization geometrical product specification standards and strategic plans for future work

Abstract

Over the last 2 years, ISO TC 213, the committee that publishes the ISO geometrical product specification (GPS) standards, has published about 35 standards, more than double the number of the preceding 4 years. This rapid development has brought many significant changes to the ISO-GPS system. The author is the chairman of that committee and gives an overview of the more important ones in this article. The work is now at a crossroad, where items that have been on the TC 213 work program for many years have been completed. This has allowed TC 213 to start new strategic initiatives that will guide the development of ISO-GPS standards over the next 8–10 years. This article will outline the two stages of the strategic plan, the changes to the ISO-GPS standards complex that is envisioned, and how it will impact the users of these standards; whether they are part of the specification community or the verification community.

Shaping the digital twin for design and production engineering

“…The Skin model permits a mental model and thought experiments to develop a theoretical inspection procedure, hence connecting the specification world to the physical world. Furthermore, several mirrored operations and uncertainties (ambiguities, method uncertainty, implementation uncertainty) were defined [14].…”

Identifying measurement knowledge and its relationship to engineering design

“…The discussion is topical because the ISO/TC 213 committee is in the midst of a major overhaul of the standards that link the disciplines of design and measurement [31]. A guiding principle for these revisions from ISO is to ensure that there is a clear separation between the processes of specification and verification.…”

Tolerancing: Managing uncertainty from conceptual design to final product

“…The chain is formed by 'chain links', which group the standards related to some specific step in the property definition. The recently redesigned [223] GPS matrix reserves the first three chain links to the tolerance specification issue (A-C), the last three chain links to the tolerance verification issue (E-G), while chain link D consists of ISO GPS standards defining the requirements for comparison between specification requirements and verification results.…”

“…Although ASME GD&T [25] does not cover this aspect, the need for tolerance verification is clearly stated in the ISO GPS [148,167]. The recently redesigned [223] GPS matrix reserves the last three chain links to the problem of tolerance verification:…”