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

In memory of Jan Van Oort

It is with great regret that we announce the death of Jan van Oort, who recently died of heart failure in Peru. Jan was a coach at SparxSystems Central Europe for many years before co-founding the start-up KIVU in 2016. Of course, he also brought Enterprise Architect...

Im Gedenken an Jan Van Oort

Mit großem Bedauern geben wir den Tod von Jan van Oort bekannt, der kürzlich in Peru an Herzversagen verstorben ist. Jan war jahrelang Trainer von SparxSystems Central Europe, bevor er 2016 das Start-Up KIVU mitgründete. Natürlich brachte er auch dort Enterprise...

SparxSystems Central Europe Webinar: “Modeling NATO Architecture Framework with Sparx Enterprise Architect”

10 June 2020, 11.00 - 12.00 h Speaker: Christian Freihoff, German Federal Armed Forces Beat Lang, Swiss Army Peter Lieber, SparxSystems Central EuropeThe NATO Framework NAFv4 will be presented in the webinar. As a real application scenario you will experience the...

SparxSystems Central Europe Webinar: “Modeling NATO Architecture Framework with Sparx Enterprise Architect”

10. Juni 2020 | 11.00 – 12.00 Uhr Sprecher: Christian Freihoff, Deutsche Bundeswehr Beat Lang, Schweizer Armee Peter Lieber, SparxSystems Central EuropeIm Webinar wird das NATO Framework NAFv4 vorgestellt. Als reales Anwendungsszenario erleben Sie die koordinierte...

Live-Webinar: June 17, 2020

Configuration Management in MBSE Agile Versioning as key technology for successful safety projects of distributed teamsConfiguration Management in MBSE June 17, 2020 – 15:00Dr. Horst Kargl (SparxSystems CE) & Daniel SieglEnglish, No participation feeModel-driven...

Live-Webinar: 17. Juni 2020

Configuration Management in MBSE

Agile Versionierung als Schlüsseltechnologie für erfolgreiche Sicherheitsprojekte von verteilten Teams
Englisch, kostenfreie Teilnahme

Live-Webinar: 27. Mai 2020 – 15:00

Generieren Sie mit Embedded Engineer 3.0 Misra-kompatiblen C/C++ Code und verbessern Sie die Rückverfolgbarkeit von Ihren Anforderungen bis zu Ihrem Quellcode.

Live-Webinar: May 27, 2020 – 15:00

Generate Misra-compliant C/C++ code to enhance traceability from your requirements to your source code using Embedded Engineer 3.0

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...

Mit neuer Struktur noch effektiver

Im Zuge der Umstrukturierung der Peter Lieber Unternehmensgruppe vollzog auch LieberLieber Software einige Änderungen, um seine Kunden noch effektiver und effizienter betreuen zu können. Die Geschäftsführung liegt nun in den Händen von Dr. Konrad Wieland, der mit dem...


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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Training & 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