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This is (more or less) back to school ! ūüôā

And it starts strong with the MODELS conference to be held this year in the Center of Munich from September 15 to 20, with a very attractive program.

Last year, we were in Copenhagen in October, with already a program less academic than in previous years, in particular:

This year, there will be an entire day dedicated to Capella, organized by Obeo and Thales, on September 16: the Capella Day Munich 2019!

It will be a unique opportunity to meet industrial users (Framatome, RATP, etc.), tool vendors (Siemens PLM Software, Artal, pure-systems, the Reuse Company, etc.), as well as the best experts on the subject: not to miss…

Germany is increasingly involved in the MBSE since the previous Capella Day had already taken place in Stuttgart in March 2018.

And there will also be two industrial days, the first dedicated to the automotive sector (Germany requires …), the second more general.

PRFC will of course give you a detailed account of the highlights of this conference: stay tuned!


Update of the Clock Radio Capella Model (start)

During my SysML trainings, I have been using for several years now a simple example of a system: the Clock Radio. This is even the main example of my SysML introductory book in French, published by Eyrolles in 2013.

As part of the Clarity project, it seemed natural to do the same exercise with Capella using the Arcadia approach and concepts. I published in 2015 a first version of the model (with Capella 1.0) where I concentrated on the System Analysis level, trying to illustrate the main types of diagrams, but also ensuring the traceability with the operational need expressed in Operational Analysis. Then a second version of the model, with the Logical Architecture level. And finally a third version of the model with the Physical Architecture level and a small example of Viewpoint: Basic Price.

It was high time to update this model, trying to illustrate the new features provided by Capella 1.2.1 and now Capella 1.3.

The first version of the new model is downloadable here. It mainly contains the System Analysis level, because the operational need is very simple ūüėČ You will find examples of SMCB, SAB, SCDB, SES, SMSM, with several variations of each.

The progressive construction of the model is presented in a small explanatory document. The model and its companion document will be progressively completed with a Logical Architecture level, a Physical Architecture level, then the use of the Requirements add-on and of Property Values ‚Äč‚Äč…

An example of Exchange Scenario Diagram that was not possible before Capella 1.2.1 is given below. This is a scenario showing how two instances of the same User actor can interact with the Clock Radio.

25 Jan 2019

Happy New Year 2019!

PRFC wishes you the best for 2019, with the implementation of an effective MBSE approach!

Let us do a quick review of 2018 from our side.

2019 seems to start on the same basis with already several Arcadia / Capella courses scheduled on customer site in France, Germany and the United Kingdom …

02 Jan 2019

PRFC was at the MODELS 2018 conference in Copenhagen

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PRFC had the pleasure of participating once again in the annual MODELS conference (cf. St Malo in 2016) organized this year in the beautiful city of Copenhagen.

20 years already that the first edition, called UML’98, was held in Mulhouse, organized by Pierre-Alain Muller!

To note the significantly more important part of industrial participants than in the past, which is a very good sign for a conference on modeling!

I was mostly interested in the Model-Based Systems Engineering Meeting and in the Industry Day.

The MBSE Meeting¬†started with a very interesting keynote of Ed Seidewitz: SysML v2 and MBSE: The next ten years,¬†Basically the main problem of SysML is its direct filiation with UML… Room for Arcadia/Capella:-)

Then we had a large number of industrial presentations on the MBSE Adoption Challenges:



The next day, a lot of people in the big Amphi for The Industry Day with some well-known presenters:

As always, diverse and rewarding encounters and an appointment made in September next year at Munich for MODELS 2019!    

30 Oct 2018

Arcadia is a French Standard (AFNOR)!

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The ARCADIA method has been standardized with the AFNOR as Experimental Standard Z67-140, by the ‘Engineering and Quality of Software and Systems’ commission:

Technologies de l‚Äôinformation ‚Äď ARCADIA ‚Äď M√©thode pour l‚Äôing√©nierie des syst√®mes soutenue par son langage de mod√©lisation conceptuel ‚Äď Description G√©n√©rale ‚Äď Sp√©cification de la m√©thode de d√©finition de l‚Äôing√©nierie et du langage de mod√©lisation

The summary of this standard is as follows:

  1. Scope
  2. Terms and definitions
  3. Specification of the ARCADIA engineering definition method
  4. General specification of the ARCADIA modeling language
  5. Specification of ARCADIA modeling language concepts
  6. Annex A (informative) Description of the ARCADIA method
  7. Annex B (normative) ARCADIA concepts and perspectives
  8. Annex C (normative) Relationship between concepts

The document XP Z67-140 was published (in French) in March 2018. It is on sale on the AFNOR shop.

Note: ARCML is the name of the modeling language dedicated to the definition of models that conform to the ARCADIA method.

26 Jun 2018

A new training course: “Capella Reader”!

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I regularly get requests for Capella trainings that would be shorter than the standard curriculum, for people who will not directly work with the tool on the creation of models, but rather as readers of diagrams made by others.

This may be the case for a client working with a contractor that uses Capella, who wishes to understand well diagrams of both Operational and System Analysis levels which are provided to him/her, in order to collaborate efficiently with the contractor. Or the case of a project leader whose architects and system engineers use Capella on a daily basis, and who must validate diagrams done on the project at all Arcadia levels. Or for a specialty engineer who must understand and leverage Physical Architecture diagrams and maybe Logical ones too.

If you are in one of these cases, this new 2-day training is made for you!

Standard content is possibly ajustable according to Arcadia levels concerned and the types of diagrams you’ll need to master.

Do not hesitate to contact us for any special needs and we’ll forward you a customized offer…

12 Apr 2018

CapellaDay 2018 in Stuttgart

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PRFC is proud to have been among the speakers of the first Capella Day in Germany!

This One-day conference on the open MBSE solution Capella took place in Stuttgart, more precisely at Thales premises in Ditzingen, on Tuesday 13th March 2018. It attracted more than 60 participants from various companies, mostly from Germany.

The program gathered both Thales gurus Stéphane Bonnet (Capella Design Authority) and Jean-Luc Voirin (Arcadia father and book author), as well as end-users in ArianeGroup and Thales Deutschland, and tools & service providers (Obeo, Artal, pure::systems and PRFC). The Eclipse Foundation was also present to promote the Capella Industry Consortium

The slides I presented: Guide to Arcadia and Capella successful adoption are available here.


16 Mar 2018

An expanded MBSE training offer for 2018!

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The¬†MBSE training offer will become richer and more modular in 2018, distinguishing better from one side ‘Language & Method’, and the other ‘Tool’, with two major streams:
The general scheme is as follows:
  • MBSE with XX¬†training contains 66% theory and 33% group reflection on a case study (without tool)
  • YY in Action training contains instead 75% of practice (with a modeling tool) and 25% of theory illustrated with examples

MBSE with XX training is a strongly recommended prerequisite of the corresponding training YY in Action.


This new scheme will enable to gradually enrich the offer with new modules, such as:










23 Feb 2018

PRFC was at ERTS 2018

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I had the pleasure of attending last week the 9th ERTS2 conférence.

This big event around ‘Embedded Real Time Software & Systems’ takes place every 2 years in Toulouse. This year there were more than 300 registrants from a very large number of companies, with a particular focus on the automotive industry and mainly the autonomous vehicle. Exciting keynotes from Renault and Airbus on the subject …

I took part in the presentations by co-animating with Benoit Viaud (Artal) a session on MBSE entitled Capella to SysML Bridge: a Tooled-up Methodology for MBSE Interoperability with work done within the framework of the Clarity project, and of course I was not far from the Capella stand!

06 Feb 2018

Books on Arcadia and Capella are available!

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I have the pleasure to inform you that the long-awaited reference books on the Arcadia method and the Capella MBSE solution are now available from Elsevier / Iste:









They both belong to a new set called: Implementation of Model Based System Engineering, in which you can also find a new book on SysML.





15 Dec 2017