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The Concurrent Design Platform 4 (CDP4) Integrated Modelling Environemnt (IME) Community Editition (CE) is the RHEA Group open source Concurrent Design desktop application and Microsoft Excel integration compliant with ECSS-E-TM-10-25 Annex A and Annex C. The CDP4-IME makes use of a plugin framework, the end-user functionality is implemented in CDP4 plugins that are loaded at run-time. This makes it straightforward to package, distribute and update the environment.

The user manual for the CDP4-IME is available online

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AppVeyor is used to build and test the C# CDP4-IME

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Concurrent Design

The Concurrent Design method is an approach to design activities in which all design disciplines and stakeholders are brought together to create an integrated design in a collaborative way of working.

The Concurrent Design method brings many advantages to the early design phase by providing a structure for this otherwise chaotic phase. Many design concepts have been implemented in the Concurrent Design method to help a team of stakeholders perform their task. The design work is done in collocated sessions with all stakeholders involved and present, creating an integrated design and enabling good communication and exchange of information between team members.

To read more about Concurrent Design and how to use the CDP4 Desktop application to perform concurrent design please read our documentation at


The CDP4-IME Community Edition make use of the CDP4-SDK.


The CDP4-IME Community Edition is provided to the community under the GNU Affero General Public License. The CDP4 Community Edition relies on open source and proprietary licensed components. Some of these components have a license that is not compatible with the GPL or AGPL. For these components Additional permission under GNU GPL version 3 section 7 are granted. See the license files for the details. The license can be found here.

The RHEA Group also provides the CDP4 Web Services Enterprise Edition which comes with commercial support and more features. Contact us for more details.


Contributions to the code-base are welcome. However, before we can accept your contributions we ask any contributor to sign the Contributor License Agreement (CLA) and send this digitaly signed to You can find the CLA's in the CLA folder.


The Concurrent Design Desktop Application and Excel Integration compliant with ECSS-E-TM-10-25 Annex A and Annex C




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