Fact Sheet: ISO 10303-242: Managed Model Based 3D Engineering (STEP AP 242)

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• Use Cases
• Guidelines
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• Best Practices

• STEP AP 242 Edition 1 provides all the functionalities covered by the AP 203 ed2 and AP 214 ed3. It includes also new functionalities, such as:
  • the “Shape Quality” modules, derived from STEP Part 59 and based on the SASIG PDQ guidelines,
  • the results of the PDM harmonization between STEP AP 242 Business Object Model and AP 239
  • PLCS Platform Specific Model,
  • a new model for STEP 3D tessellated geometry and
  • new generic capabilities for STEP “external element references” used for kinematics and other disciplines.
• AP 242 Edition 2 is the extension of AP 242 Edition 1 to the electrical design domain, completed with specific enhancements in the following domains:
  • PDM,
  • 3D geometry,
  • 3D PMI,
  • composite and
  • mechanical design.

• STEP AP242 will replace STEP AP203 & AP214 exchange
• In combination with STEP AP242 XML for product structure and meta data 3D geometry and PMI could be referenced
• The benefits of using STEP AP242 are
  • a CAD editor independent solution as 3rd party tools exists
  • a solution for exchanging data between different CAD toolsets
  • support of exchanging data across companies borders (supply chain)
  • support of data migration between different releases or even systems

• Data security and IP protection will be not solved by using STEP AP242. Only the “history” and features could be protected, but exact geometry is available
• Due to conversion of exact geometry (NURBS, Bezier) and used tolerance and accuracy model of each CAD kernel conversion issues could appear
• For 3rd Party interface vendors in most cases tool editors do not provide complete API and therefore some tools are developed by reverse engineering (risk of release changes)
• Still ongoing extensions planned e.g. Additive Manufacturing, Electrical Harness etc.