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:

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 Software: Volkswagen accelerates with Enterprise Architect

Volkswagen relies on Enterprise Architect along with bespoke LieberLieber modeling assistants to clearly and precisely communicate its requirements on infotainment software and systems development to its suppliers, and can now move ahead with...

LieberLieber Software: VW nutzt Enterprise Architect

VW setzt im Bereich der Software- und Systementwicklung für Infotainment Systeme auf Enterprise Architect. Die Modellierungs-Plattform wird dabei mit maßgeschneiderten Assistenten von LieberLieber dafür verwendet, um die Anforderungen einer neuen...

LieberLieber Software: Praktikumsplätze sehr gefragt

Im Rahmen der Zusammenarbeit von LieberLieber mit dem Christian Doppler Labor (CDL-MINT) der Technischen Universität Wien wurden im August sieben Praktikanten und eine Praktikantin in die Grundlagen der modellbasierten Entwicklung eingeführt....

LieberLieber Software: Umfassendes Training in Hamburg

LieberLieber bietet mit dem erfahrenen Schulungsinstitut oose erstmals ein fünftägiges Seminar „SysML-Light mit Enterprise Architect“ an. Die Veranstaltung ermöglicht einen praxisorientierten Einstieg in die Modellbasierte Systementwicklung und findet vom...

LieberLieber Software: LemonTree startet breit in den Markt

LieberLieber hat mit seinem Produkt LemonTree ein revolutionäres Entwicklungswerkzeug realisiert. Das Tool dient der Zusammenführung verschiedener Modellversionen und ist vor allem bei Entwicklern sicherheitskritischer Anwendungen sehr beliebt. Das große...

Peter Lieber am Software Architecture Day 2018

Am 13. Juni 2018 hostet Conect Informunity den Software Architecture Day bei Microsoft Österreich in Wien. Bei der eintägigen Veranstaltung werden viele verschiedene Themen rund um IT-& Softwarearchitektur diskutiert und behandelt.  Peter Lieber wird dort einen...

Mesconf 2018: Vortrag und Workshop

Auf der Mesconf am Infineon Campeon in Neubiberg bei München stellte Dipl.-Informatiker Tim Michaelis, Softwarearchitekt bei Preh Car Connect, am 7. Juni 2018 das gemeinsam mit LieberLieber durchgeführte Projekt zur Modellversionierung in der...

LieberLieber Software: Safety & Security by Design

LieberLieber arbeitet im VÖSI Arbeitskreis „Safety & Security“ an der Umsetzung dieser beiden Aspekte „by Design“ in Software. Erste Ergebnisse wurden kürzlich im Rahmen einer Fachkonferenz in Wien präsentiert. Wien – Der Verband Österreichischer Software...

LieberLieber Software: Modellbasierte Entwicklung setzt sich durch

Eine wesentliche Komponente auf dem Weg zur Energiewende ist die Realisierung des intelligenten Stromnetzes, des „Smart Grid“. Daher hat die Peter Lieber Unternehmensgruppe bereits 2014 mit der FH Salzburg eine Kooperation begonnen. Dabei wurde die...

LieberLieber Software: Normengerechte Software für HIMA

HIMA ist ein führender Anbieter von smarten Sicherheitslösungen für die Industrie und arbeitet seit 2012 mit Enterprise Architect. Bei einer Schulung wurde das Unternehmen auf LemonTree von LieberLieber aufmerksam und erkannte das große Potenzial der...


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”.

Profit from the LieberLieber

At LieberLieber, our model-based software and systems development customers receive everything from a single source: consulting, collection of requirements, creation of individual tools, integration into the existing tool chain, tailor-made training and ongoing support. LieberLieber - Models are our world!

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