ECSS-E-TM-10-25A – Engineering design model data exchange – CDF (20 October 2010)


This Technical Memorandum, under the ECSS-E-10 System Engineering in the engineering branch of ECSS series of documents, defines the recommendations for model based data exchange for the early phases of engineering design.

This Technical Memorandum facilitates and promotes common data definitions and exchange among partner Agencies, European space industry and institutes, which are interested to collaborate on concurrent design, sharing analysis and design outputs and related reviews. This comprises a decomposition of a system down to equipment level and related defined lists of parameters and disciplines. Further it provides the starting point of the space system life cycle defining the parameter sets needed to cover all project phases, although the present Technical Memorandum only addresses Phases 0 and A.

When viewed in a specific project context, the information provided in this Technical Memorandum should be adapted to match the specific need of a particular profile and circumstances of a project.

Ultimately, the objectives of the work can be summarised in three points:

  • Creation of concurrent design facilities using a common / compatible data model;
  • Enable effective data transfer across models belonging to different but compatible organizations / facilities;
  • Enable real-time collaboration and joint activities among multiple organizations / facilities.


Main parts

  • Clause 4 specifies general information to achieve the objectives.
  • Clause 5 recommends a list of requirements for exchange of engineering design model data amongst concurrent design activities.
  • Annex A defines the Space Engineering Information Model (SEIM) main objects, such as Space Engineering Organisation, Processes, Products.
  • Annex B defines the Space Engineering Reference Data Library (SERDL). The SERDL contains names, descriptions, dimensions, units and unique codes for the set of parameters defining a Concurrent Engineering design.


This SEIM and SERDL are implemented in the ESA Open Concurrent Design Server (OCDS) project, which realizes an implementation of this data model.

This Technical Memorandum is intended to evolve into an ECSS Standard in the near future. For the time being, it is not yet possible to establish a standard that has the maturity and industrial validation required for application in new or running space projects. In conjunction with related development and validation activities, this Technical Memorandum should be regarded as a mechanism for reaching consensus prior to building the standard itself.



This Technical Memorandum supports following ECSS Standard: ECSS-E-ST-10C (6 March 2009).