Model-based systems engineering with Enterprise Architect and LemonTree

Models help you keep track of your systems development

The benefits of models in the development of systems are clear

  • Basis for discussion – The model serves as a basis for discussion for all subject experts and developers involved
  • Documentation – The model automatically creates a consistent system documentation
  • Traceability – Changes to the model can be traced and tracked at any time
  • Abstraction Levels – Models can be executed in different levels of detail, as required
  • Functional Safety Management – Models are ideally suited to comprehensively implement functional safety requirements

LieberLieber EXPERTISE

LieberLieber has developed customer-specific models for decades and therefore possesses excellent know-how.

Systems Engineering is one of our main areas of competence. We offer:

  • Profound knowledge of development languages such as UML and SysML.
  • AUTOSAR modeling with Enterprise Architect
  • Implementation of Functional Safety Requirements in accordance with industry standards via Enterprise Architect, UML and more.
  • Code generation and traceabilty
  • Model validation ensures adherence to modeling methodology
Functional Safety Management with Enterprise Architect

Configuration Management: The most important Use Cases

MBSE Extensions for Enterprise Architect

The Systems Modeling Toolbox (SYSMOD) is a pragmatic approach by Tim Weilkiens to model the requirements and the system architecture of a system. It provides a toolbox of tasks with input and output work products, guidelines and best practices. SYSMOD uses the OMG Systems Modeling Language (OMG SysML), but could also be used with other languages. Learn more about SYSMOD

Download SYSMOD© MDG Technology for Enterprise Architect 14 here:

Our product LemonTree

Special requirements on software and systems development often arise in a modern modeling infrastructure when development is handled in distributed teams. A central aspect is the merging of parallel model versions (Diff & Merge). This is one of our key areas of specialization:


  • Comparison and merging of Enterprise Architect models
  • Parallel editing of models via optimistic model versioning
  • Seamless integration in Subversion, Git, PTC or other VCS
  • Model branches
  • Changes are shown clearly and intuitively (incl. Merge Preview)
  • Review function for calculated changes


News in model-based systems engineering

LemonTree 3.0 – Live Demo of Reusable Model Components

LieberLieber specialists show you live the new features and benefits of LemonTree 3.0! Tuesday 27. April 2021, 02:00 PM (Vienna, Austria).

LemonTree 3.0

When LieberLieber launched its product LemonTree four and a half years ago, its success story was not yet foreseeable. However, as the trends in software and system development continued to intensify, LemonTree 3.0 now opens up completely new possibilities for product...

LieberLieber Software: SDC Systems distributes LemonTree in the UK

With the new partner SDC Systems LieberLieber strengthens its distribution in the UK and Ireland. SDC Systems has a large base of Enterprise Architect users and includes LemonTree and codeBeamer Connector for Enterprise Architect in its portfolio.Vienna/Hertfordshire...

LieberLieber Software: NATO relies on Enterprise Architecture

With the aim of modernising its business and IT landscape, NATO is relying on the recently introduced NAFv4 framework. The German Bundeswehr and the Swiss Army have chosen Enterprise Architect (Sparx Systems) as their standard modelling tool to use this framework with...

Even more effective with new structure

In the course of the restructuring of the Peter Lieber group of companies, LieberLieber Software also made some changes in order to be able to serve its customers even more effectively and efficiently. The management is now in the hands of Dr. Konrad Wieland, who has...

Infineon relies on LemonTree

At Infineon's Munich location, the company relies on model-driven development with Enterprise Architect. In addition, the advantages of LieberLieber LemonTree were also recognized in order to be able to merge the models created directly in Git into different feature...

Emerasoft distributes LemonTree in Italy

As a consequence of the great demand, LieberLieber LemonTree is conquering the Italian market with the support of a local partner. Together with Profesia, the Turin-based software specialist Emerasoft is an important partner of Sparx Systems (Enterprise Architect) in...

LemonTree 2.5

As part of the ongoing development of its plug-and-play product for model versioning, LieberLieber recently introduced LemonTree 2.5. For even easier handling, the tool is now directly integrated into Enterprise Architect and supports basic Git functions. In addition,...

LieberLieber Software: Replacing documents with models

In a department of a leading German automotive supplier, model-based software development is now being implemented to its fullest. This trend-setting move away from a traditional, document-centered method was only made possible by the use of...

LieberLieber Software: LemonTree for successful Change Management implementation

Functional safety standards such as ISO 26262 also require configuration and change management in models. LemonTree is used for this purpose in the software development of a leading German automotive supplier. The tool’s user-friendly features...

What customers are saying

Hirschmann Car Communication
As a leading manufacturer, we want to introduce such disruptive technologies as quickly as possible, even if they change the current way of doing business. In our field, technical advancement gives us a key competitive edge that distinguishes us from our competitors. We must always be ready to enter new territory.


Thomas Adam
Head of Technology & Innovation, Hirschmann Car Communication

Hilti Power Tools
When implementing other code generators, these requirements were not fulfilled. Therefore, it soon became clear that the approach of LieberLieber was very practical and promising for us. Since during code generation activity diagrams and state machines play the greater roles, the internal learning curve can be reduced to one week. After this time, our developers can already model on their own and generate runnable code – another very positive surprise.


Dr.-Ing. Michael Fuchs
Software, electronics & drives

LieberLieber’s approach is very pragmatic: You can continue to use existing software and still switch to a model-based approach when it makes sense. This makes it much easier for us to decide on the fly whether or not to take this step. This also allow us to intensify our cooperation with LieberLieber on an ongoing basis, trying out new things over and over again.


Klaus Kindl
Founder and CEO at Petwalk Solutions

Customer Success Stories


Hirschmann Car Communication is a leading German supplier of transmitter and receiver systems. The company has long based its systems development on Enterprise Architect. Now, in a preliminary project for a remote tuner, LieberLieber Embedded Engineer is being used to generate executable source code from their UML system model.


Following exhaustive tests, the renowned construction industry supplier Hilti decided on LieberLieber’s uml2code Code Generator for Embedded Systems for Enterprise Architect.


Petwalk, the Austrian specialist for automatic dog and cat doors, is on an expansion course. In order to meet the strict safety regulations required for access to the American market, the company sought the support of LieberLieber. Together, they are now developing a model-based solution that demonstrably meets all safety regulations.

Profit from the LieberLieber

With us, customers get everything they need for model-based software and system development from a single source: in-depth consulting, careful assessment of requirements, creation of individual tools, integration into the existing tool chain, customized training and ongoing support.

  • Everything from a single source
  • More efficiency in your modeling team
  • Integration into your infrastructure
  • Plug & Play products
  • Top training & support


We share our knowledge with you.

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We are tool development specialists.

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We ensure smooth tool interaction.

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Training & Support

We give you advice and support.

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Contact us today!

via Telephone: +43 662 90600 2017

LieberLieber Software GmbH
Handelskai 340, Top 5
1020 Wien, Austria
+43 662 90600 2017

LieberLieber Software Corp
2800 Post Oak Blvd., Suite 4100
Houston, TX 77056
+1 832-390-2461

LieberLieber Software s.r.o.
Bratislavská 264
Kúty 90801
SVK - Slovensko