Beginners Guide to Model-Based Systems Engineering

12/18/2018

System Behavior

• Shows what a system does or appears to do without regard to how (implementation) it does it • Is represented graphically by a view integrating the control (functions and constructs) view with the interface (inputs and outputs) view

Behavior is essential for providing the complete systems engineering perspective for any system or process

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Why Behavioral Analysis? Why not Stop with Function Identification? • Classical 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)

hierGeospatialLibrary Context Function - Level2

C

Geospatial Library Context Function - Level2

1.1

1.5

1.7

2.2

2.4

2.6

2.8

Report DeficienciesAnd Recommendations

Generate Performance Report

NotifyUserOf Estimated Schedule

Accept And FormatCollector Products

Accept And FormatRequest

Get Product From Inventory

PrioritizeRequest

1.4

1.6

2.1

2.3

2.5

2.7

1.3

Evaluate Products vs. Request

Notify Customer ofDisapproval

CheckProduct Inventory

Determine CollectorMix

Put Product In Inventory

Provide Product ToCustomer

TaskCollectors

Behavioral analysis 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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