Fact Sheet: ISO 10303-243 (STEP AP243)

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Short Description/
Transmitted Information
  • Definition of standard for web services to improve decision making for complex products 
Normative document
Version/ Release state
  • International Standard
Release date
  • 2021
Application Scope
  • Combining Modelling and Simulation Data with Collaboration Data to justify change decisions and to validate the product throughout the product life-cycle
  • Traceability of modelling and simulation technical data to the systems engineering and product/simulation lifecycle context
  • Efficient information sharing using web services
Promoting Bodies
  • MoSSEC Project (Aerospace and defense industry)
  • ISO Standard
IT Standard Classification
  • Interoperability Standard, Integration Standard
Data Format
  • XML Schema, RESTful web-services (JSON OpenAPI)
Additional available resources
Relevant prostep ivip project groups


10303-243 wants to provide traceability to respond to business questions like:

  • (Who) What organization was used for this simulation/analysis?
  • What requirement version should be used for this behavior analysis assessment
  • This method/tool should be used for this requirement verification.
  • (How) What method/tool was used for this simulation?
  • What is the delta of the product definition that should be sent for this simulation?
  •  Where was this assumption used for a decision?
  • Why was this technology used for this component?
  • Prove that the right analysis result was used for this assumption.
  • If there is a change to this requirement version what does it impact?
  • This behavior simulation model should be used for this breakdown element (of thisarchitecture, with these interfaces and these operational scenarios).

Relevance and Benefit for MBSE

  • Ensure consistent product information models through the different product life cycles and technical disciplines (ref.: results of the ASD SSG “Through life cycle interoperability” WG).
  • Ensure the smooth evolution and the longevity / upward compatibility of the STEP modular standards.
  • Speed up the adoption of the STEP based standards, by the proper management of a set of consistent standards, sharing the same principles and common subsets (modules).
  • Improved decision making for complex products, improved traceability
  • Improved sharing of modelling and simulation information linked to a Systems Engineeringcontext