Functional Architectures with SysML

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Myra Newman
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1 Functional Architectures with SysML Jesko Lamm Senior Systems Engineer Tim Weilkiens Managing Director

2 by Bernafon AG We believe in a world, in which people with restricted hearing can communicate again without limitations Bernafon thanks to advanced technology. Jesko Lamm works at Bernafon, a Swiss manufacturer of hearing instruments. As a Senior Systems Engineer, he is responsible for the processes in system architecture and for working as a system architect in development projects, based on model-based systems engineering with SysML.

Jesko Lamm works at Bernafon, a Swiss manufacturer of hearing instruments.

Consulting and Training Headquarter Hamburg, Germany Tim Weilkiens, managing director of the German consultancy

3 We enable organizations to achieve their business goals themselves with innovative methods of Software and Systems Engineering. Consulting and Training Headquarter Hamburg, Germany Tim Weilkiens, managing director of the German consultancy oose GmbH, is a member of INCOSE MBSE Challenge Team SE^2 (Telescope modeling). He is also an active member of the OMG working groups about SysML and UML and has written sections of the SysML specification.

4 Same functionality evolving components: Produce Sound

5 Same functionality evolving components: Produce Sound

6 Same functionality evolving components: Produce Sound

7 Same functionality evolving components: Produce Sound

8 Functional descriptions of a system can be re-used Function Produce Sound

9 What is Functional Architecture? Architecture identifies the elements of a system and relates them to each other. Functional Architecture is based on functional elements whose input and output are related to each other via a function. Functional Element #1 Functional Element #2 x y z y f (x) z g(y)

10 Information model Functional Architecture -Functional Unit -Functional Group Functional Element -Sub-element Function -Sub-function 1 1..* -Provider 1 -Requester 1 Exchange of Information Flow of Energy Connection Flow of Force Flow of Material

Modeling Functional Architecture Functional Block Functional Architecture 1 -Functional Unit -Functional Group Functional Element -Sub-element Function 1 1.

11 Modeling Functional Architecture Functional Block Functional Architecture 1 -Functional Unit -Functional Group Functional Element -Sub-element Function 1 1..* -Provider 1 -Requester 1 Exchange of Information Connection Flow of Force -Sub-function Flow of Energy Flow of Material Representation in the model Concept

1..* -Provider 1 -Requester 1 Exchange of Information Connection Flow of Force

12 Modeling Functional Architecture Functional Block Functional Architecture -Functional Unit Representation of a Function -Functional Group -Funktionsgruppe Representation of a Sub-function 1 Functional Element -Sub-element Function -Sub-function 1 1..* -Provider 1 -Requester 1 Exchange of Information Flow of Energy Connection Flow of Force Flow of Material Representation in the model Concept

Functional Element -Sub-element Function -Sub-function 1 1.

13 MATLAB and Simulink are registered trademarks of The MathWorks, Inc. Functional Architecture (without SysML) Simulink (Version 7.6) Functional Block 1 Functional Element Representation of a Function -Funktionsgruppe Representation of a Sub-function Function -Sub-function 1 Representation in the model Concept Example

6) Functional Block 1 Functional Element Representation of a Function

OMG Systems Modeling Language (OMG SysML) is a trademark of the Object Management Group Functional Architecture (SysML representation) Functional Block OMG SysML

14 OMG Systems Modeling Language (OMG SysML) is a trademark of the Object Management Group Functional Architecture (SysML representation) Functional Block OMG SysML 1 Functional Element Functions are implicit Function 1 -Funktionsgruppe Representation of a Sub-function -Sub-function Representation in the model Concept Example

OMG SysML 1 Functional Element Functions are implicit Function 1

15 Method for Creating Functional Architectures

16 Functional Requirements vs. Use Cases

17 Create Activity Diagrams

18 Activity Trees* of Use Cases by oose innovative Informatik GmbH & Bernafon AG * also called Function Trees

19 Heuristics for Grouping Activities

20 Heuristics to Derive Functional Blocks Use grouping criteria of existing groups Abstract and secondary use cases define a functional group One functional group takes the functions that are related to system actors Function calls imply cohesion Functions that share data can be grouped

group One functional group takes the functions that are related to

21 Example: Functions that Share Data Can Be Grouped The remaining functions yield a group Adjust Volume. Functions around the Audio Signal yield a group Amplify Sound.

22 Example: Functional Architecture

23 Mapping Functions to Components

24 Functional Architectures Live Longer Than Technologies

25 Conclusion Functional Architecture... represents the purpose of the system. is independent from the technical solution. focuses the user. is stable. does not impose technical solutions. can be re-used across product families and product generations. reduces development effort. increases customer benefit. enables innovative solutions.

26 by oose innovative Informatik GmbH & Bernafon Outlook: Tool support Tool support can facilitate the creation of functional blocks A first study* with Artisan Studio has been done A MagicDraw plugin is under development News: Tool Support * Korff, Lamm, Weilkiens, Talk at the German Systems Engineering Conference TdSE, Nov (

27 Functional Architectures with SysML Jesko Lamm Senior Systems Engineer Tim Weilkiens Managing Director

Tools for Forging the Functional Architecture

Tools for Forging the Functional Architecture Andreas Korff 1, Jesko G. Lamm 2, Tim Weilkiens 3 1 Atego Systems GmbH, Major-Hirst-Str. 11, 38442 Wolfsburg, Germany, andreas.korff atego.com 2 Bernafon