MBSE with GENESYS 073122

Why Behavioral Analysis? Why not Stop with Function Identification?

Functional analysis results in function lists/trees (necessary, not sufficient) • Incomplete sequencing of functions • Incomplete definition of items and functional interfaces • Missing performance allocation (or lacking in defensibility)

Behavioral analysis is more difficult, more time consuming, but more complete. Perform the required analysis now, or wait until integration & test to find the problems.

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Functions and Items: Two Primary Parts of Behavior

Functions • A process that transforms inputs into outputs • An action taken by the system or one of its elements • Represented by a verb or verb noun pair

Items • Cross the system (or component) boundary • Passive things that are inputs and outputs of our system • Can be data, signals, force, physical objects

Color Code

Component

Component

Requirement Element

Functional Element

input to / triggers

performs

performs

Physical Element

Interface Element

outputs

Item

Verification Element

Other Element

Function

Function

Item

input to / triggers

outputs

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MBSE with GENESYS