Figure 8 illustrates the organizational relationships.
McCaleb{#9787} identified deficiencies in the datum system information model but the issues were deferred.
The manufacturing suite of STEP APs (ISO 10303-214, ISO 10303-224{#3268} and ISO 10303-238{#96743}) harmonized their approach to dimensions and tolerances with the Application Modules for Dimensional tolerancing (ISO/TS 10303-1050) and Geometrical tolerancing (ISO/TS 10303-1051) in 2005 based in part on input from ISO TC213{#11317}. The design and manufacturing APs harmonized the approach to support three dimensional geometry with the adoption of ISO 10303-514{#18376}, Advanced boundary representation. Subsequently, editions of AP 203, AP 209{#95805}, AP 210{#29983}{#84361}, AP 214, AP 219, AP 224, AP 238 and AP 240{#37813} became available that used the harmonized approach in those two areas. That established a solid baseline for manufacturing even as research and development of software interfaces supporting mechanical model to piece part fabrication and inspection workflow automation continued{#35631}.
During the same time period, ISO TC 10, ISO TC 213 and the ASME Y 14 standards committees continued development{#77818},{#75641} of rigorous standards in support of model based approaches to design and manufacturing. These updates removed many ambiguities in the source documents, lending credence to the idea that information models based on them should be updated. Documents supporting activities including designer-software interaction (e.g., ISO 16792 and ASME Y14.41-2012), CAD to CMM (e.g., ISO 1101) were becoming available lending clarification to data exchange requirements between design and manufacturing (and back to design). Horst et. al.{#90745} noted several requirements for design CAD PMI information models.
As a result of their implementation experience, the CAX-IF identified issues with{Ranger, 2009, #72600},{#37027} AP 203 and AP 214 coverage of relevant ASME and ISO standards. These issues were captured in the instance{#51481} of bugzilla{#32662} devoted to ISO 10303 that is managed by ISO TC 184/SC 4.
Over the past decade, the data model and document publication architecture used for STEP were revised to follow a modular approach (STEPmod).
With the available issues and the impetus of forthcoming documents from ISO TC 10, ISO TC 213 and ASME Y 14, a project was established to update ISO 10303-47{#33831} and relevant STEPmod modules. The project would result in publication of ISO 10303-242.