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: 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...

LieberLieber: Modelling brings more safety

The EU research project VALU3S aims to reduce the development effort of automated systems with regard to safety, cyber security and data protection requirements (Safety & Security). For this purpose, 41 partners from 10 countries worked closely together over the...

LieberLieber: How to automatically deploy models at scale

The Enterprise Architect Global Summit 2023 will take place online on 11 and 12 September 2023 and will feature presentations and discussions on a variety of topics related to Enterprise Architect, Prolaborate and LemonTree. Daniel Siegl will be giving a talk on "How...

LieberLieber: SysML v2 beta – next generation system modelling

Shortly after Ed Seidewitz introduced SysML version 2 in his keynote at the 2nd MBSE Summit in Traunkirchen, the beta specifications were approved by the Object Management Group (OMG) on 10 July and explained in a press release. The specifications enable...

2nd MBSE Summit was a great success

The 2nd MBSE Summit organised by LieberLieber Software together with the Johannes Kepler University Linz (CDL-MINT) at the International Academy Traunkirchen am Traunsee (June 5-6, 2023) was a great success with more than 80 participants and brought the MBSE community...

Presentation at Mesconf 2023

Philipp Kalenda presented a comprehensive scenario at Mesconf in his one-hour talk "Requirements & Architecture: Managing Traces in a model-based Build Pipeline" including the recently introduced LemonTree family (see graphic). The interest was very high and there...

LieberLieber Software: LemonTree becomes family

LieberLieber launched its product LemonTree more than six years ago. As the demand expanded more and more, LemonTree has become a product family in the meantime. An important part of this is the LemonTree.Connect product group, which connects various ALM systems with...

LieberLieber Software: Whitepaper LemonTree.Automation

How to successfully work with LemonTree.Components and LemonTree.Automation in a build pipeline using version control This white paper describes how to integrate LemonTree.Components and LemonTree.Automation into a DevOps process to efficiently manage the lifecycle of...

2. MBSE Summit in Traunkirchen, 5. – 6. June 2023

After last year's great success, LieberLieber is organising the MBSE Summit for the second time from 5 - 6 June 2023. The venue will again be the "Internationale Akademie Traunkirchen" (Traunsee/Upper Austria), which has proven to be a great place for in-depth...

MedConf 2023: Our offer for medical technology

The MedConf - Software and Device Development in Medical Technology will take place from 23 - 25 May 2023 in Munich Unterhaching as an attendance event. LieberLieber and SparxSystems CE are exhibitors and speakers for the first time at this conference, which has...


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


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Contact LieberLieber!

by phone under +43 662 90 600 2017 

Contact us today

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