LieberLieber’s vast project experience has resulted in an effective method for creating modeling infrastructures that meet even the most complex requirements.

The optimal use of modeling for your company is ensured by targeted design, adaptation and expansion of your infrastructure.

  • Use your existing infrastructure
  • Create an adaptation concept
  • Work efficiently even in distributed teams
  • Product line development for modeling
  • Re-use of established versioning concepts for models
  • Fulfillment of the ISO 26262 standard

LieberLieber EXPERTISE

LieberLieber has experience with a wide variety of infrastructures and is familiar with transforming them into a productive modeling environment. In doing so, we carry over the specifications and internal processes of your company, for example with regard to versioning, variant management or product line development. We align our strategy and the tools used to seamlessly integrate modeling into the existing setting. Because we realize that newly-added modeling tools should not dictate the processes, but must of course adapt to them.

Model Versioning for Product Line Engineering:

Model Versioning and Enterprise Architect:

Configuration Management: The most important Use Cases

Our product in your modeling infrastructure

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 Modeling Infrastructure

LieberLieber: LemonTree is very popular in higher education

Vince Molnár is an assistant professor at the Budapest University of Technology and Economics, where he teaches MBSE with a groundbreaking paradigm shift towards automated quality gates and reviewing pull requests rather than grading submissions. Last semester he used...

MedConf 2024: Agility for the healthcare sector

MedConf - Software and Device Development in Medical Technology will take place from 16 to 18 April 2024 in Munich Unterhaching as an in-person event. LieberLieber and its sister company SparxSystems Central Europe will once again be represented as exhibitors and...

Daniel Siegl: “The victims of a lack of SysML v2 conformity will be the users!” – Discussion about SysML v2 on the Systems Engineering Trends blog

Daniel Siegl: "The victims of a lack of SysML v2 conformity will be the users!" - Discussion about SysML v2 on the Systems Engineering Trends blog Daniel Siegl from LieberLieber recently organised a top-class discussion on the topic of SysML v2 conformance, which has...

SparxSystems CE and LieberLieber proudly present: The model-based healthcare system

An initiative for targeted digitalisation in the healthcare sector In the Whitepaper "Model-driven digital health", Oliver Matthias Kipf, Solution Lead at BIX (a Boehringer Ingelheim company), presents the many opportunities that a healthcare system whose development...

The Future of Systems Engineering

Exploring MBSE trends in research and industry Best of MBSE Summit 2023 Model-Based Systems Engineering is becoming increasingly important. From design to execution, complex systems should be supported with human-comprehensible and machine-readable models. In this...

TdSE 2023: We were there!

This year we were represented at TdSE with a stand, a tutorial and as a participant in the discussion on SysMLv2. While Konrad Wieland mainly welcomed visitors and interested parties at our stand, Daniel Siegl and Philipp Kalenda showed an end-to-end example in the...

eXplore LieberLieber

eXplore LieberLieberDo you want to quickly find the information you are looking for on the LieberLieber homepage? Then we have the right tool for you: eXplore LieberLieber eXplore LieberLieber is a navigation tool with which you can quickly find the content relevant...

LieberLieber: New Release – LemonTree 4.0

With version 4.0, the LemonTree family now has a completely new user interface as well as innovations for web-based reviews and continuous integration. The new user interface has been optimised for user friendliness and feedback and offers a 4K resolution for even...

LieberLieber Software: Internships in high demand

This year LieberLieber invited nine trainees for an introduction to the basics of model-based development. The work on concrete projects enthused the young participants for the highly specialised field. The interest in an internship at LieberLieber was so great this...

LieberLieber: Festo uses LemonTree.Connect

With more than 20,000 employees, Festo serves about 300,000 industrial customers in 176 countries. In the "Embedded Software Platform" project, LemonTree.Connect codeBeamer has recently been used in addition to Enterprise Architect and LemonTree. This bridges the gap...


Preh Car Connect
As our company continues to see strong growth and the implementation of numerous series projects, we can effectively use components of our own software again and again. So far, however, this has only been possible through the laborious manual copying of software architecture models. Together with LieberLieber, we are now working on a project that will automate such processes. LemonTree is an important building block for us in order to be able to implement these development steps faster and more easily.

Tim Michaelis
Software architect at Preh Car Connect

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
Gründer und Geschäftsführer von Petwalk Solutions

HIMA Paul Hildebrandt GmbH
“In general, standards such as IEC 61508 demand the application of configuration management. This refers to all artifacts, including UML models. LemonTree from LieberLieber is our key to revealing the changes that have been made to a revision.”

Dipl.-Ing. (FH) Stefan Müller
HIMA Paul Hildebrandt GmbH, Safety-related automation solutions

Customer Success Stories


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.


The rapidly-growing automotive supplier Preh Car Connect GmbH is re-establishing its software development on the Product Family Engineering methodology. Preh engineers, already longtime Enterprise Architect users, were recently introduced to LemonTree from LieberLieber. The new concept was unveiled in a joint presentation and is nothing short of ambitious.


The global leader in smart industrial security solutions, HIMA has used of Enterprise Architect since 2012. It was during a training course that HIMA became aware of LemonTree and recognized the great potential it holds for the versioning of EA models. Before long, a joint effort had been mounted to develop specific enhancements to LemonTree in order to satisfy HIMA’s stringent requirements on “smart safety”.


Bei uns bekommen Kunden rund um die modellbasierte Software- und Systementwicklung alles aus einer Hand: fundierte Beratung, sorgfältige Erhebung der Anforderungen, Erstellung individueller Werkzeuge, Integration in die bestehende Werkzeugkette, maßgeschneidertes Training und laufenden Support.

LieberLieber – Modelle sind unsere Welt!

  • Alles aus einer Hand
  • Mehr Effizienz in Ihrem Modellierungsteam
  • Integration in Ihre Infrastruktur
  • Plug-and-Play-Produkte
  • Top Training & Support


We share our knowledge with you.

learn more


We are tool development specialists.

learn more


We ensure smooth tool interaction.

learn more

Training & Support

We give you advice and support.

learn more

Contact LieberLieber!

by phone under +43 662 90 600 2017 

Contact us today

LieberLieber Software GmbH
Gumpendorfer Straße 19
1060 Wien, Austria
+43 662 90600 2017

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