Beginners Guide to Model-Based Systems Engineering

12/18/2018

Key Semantics of EFFBDs, cont.

• Resources

• Typically name only • Drawn as rounded rectangle with double-line border • Arrowhead location indicates relationship

• On resource indicates produces • On function indicates consumes • On both indicates captures

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effbdThread2 -ProductNot In Inventory

Mapping Enhanced FFBDs (EFFBDs)

t.2.1

t.2.2

t.2.3

Customers

t2.Make Information Request

t2.Receive Estimated Schedule

t2.Accept Products

t2.Estimated Delivery Schedule

t2.Information Request

t2.Priority of Request

t2.Collection Products

t.2.7

t2.Notify Customer of Estimated Delivery

t.2.4

t.2.5

t.2.6

t.2.9

t.2.10

System

t2.Provide Product To Customer

AND

t2.Accept& FormatRequest

t2.Prioritize Request

t2.Determine CollectorMix

AND

AND

t2.AddProduct To Inventory

AND

elicits

t.2.8

Requirement

Use Case

t2.TaskCollectors

elaboratedby

t2.Collector Mix

t2.Collector Tasking

t2.Collector Data

refinedby

basedon / specifiedby

verifiedby

specifiedby

includes/ extends/ kindof

t.2.11

t.2.12

Collectors

t2.Process and ProvideCollected Data

t2.CollectData

Verification Requirement

t2. Unprocessed Data

verifiedby

fulfilledby

involves/ describes

executedby

Verification Event

Resource

employs

Level of Detail: High Audience: Not software engineers or SysML zealots Content: Composition, triggering, resourcing, and allocation Use: Full specification of system behavior; best at higher levels of decomposition (level 0, level 1, …) when dealing with broader audiences

includes

Test Configuration

Test Activity

captures/ consumes/ produces

formedby

Test Procedure

decomposedby

Component

Function

performs

incorporates

exhibits

exitsby

built from / kindof

exposes

decomposedby

joined to

State

enters

exitedby

inputs/ outputs/ triggeredby

Exit

Interface

Port

decomposedby

includes

comprisedof

Event

Transition

responsible for

connectsto

triggeredby

Link

Item

transfers

includes

decomposedby

constrains/ usesparameter from

generates

results in

causes

assignedto

Organization

Constraint Definition

Concern

Risk

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