Blog

The SysML callout notation

28. March 2012

I’ve just found this question in a sysml discussion forum: Is it really not possible to place requirements objects on an Activity, State Machine, or several other similar behavioral diagrams? Yes, it is not allowed to put requirement elements on a state machine or activity diagram. Since it is essential to show such cross cutting…
Read more

The SYSMOD Zigzag Pattern

26. March 2012

Are your requirements really free of any solution? Requirements describe the What, the system architecture describes the How. Sounds easy, but…. Requirements are solution-free and they contain solution aspects at the same time. It depends on the level of abstraction. Let’s assume that you have absolutely solution-free requirements (I argue that those requirements are not…
Read more

Update: SYSMOD and MagicDraw

23. March 2012

NoMagic provides a free SYSMOD plugin for MagicDraw (see Download page). NoMagic just released SysML version 17.0.1 SP2 with the following updates for the SYSMOD plugin: The New SYSMOD profile version is now with enhanced variants modeling support (See CarAccessSystem example model). The message box stating that the SYSMOD plugin should be installed will no longer…
Read more

The Death of the Actor

20. March 2012

The technical term System is relative and depends on the viewpoint. From one viewpoint an entity is a system, from another one it is a subsystem or an external system. It is a role that is applied to an entity. You loose this flexibility of changing the viewpoint if you model a system context with…
Read more

MBSE in a Blog

10. March 2012

In many respects, the future of systems engineering can be said to be “model-based.” (INCOSE Vision 2020) Model Based Systems Engineering (MBSE) is a key technology to respond to the need of developing more and more complex systems in more and more complex (network) organizations. I work in the MBSE domain since 10 years. I’ve written…
Read more