BAE SYSTEMS Overview of Systems Engineering at BAE SYSTEMS & ALENIA MARCONI SYSTEMS...

BAE SYSTEMS

Overview ofSystems Engineering

atBAE SYSTEMS & ALENIA MARCONI SYSTEMS

04/19/23/MS115-01

By

Leigh Watton

Friday 27th July 2001

BAE SYSTEMS

WOOLLY BIT

The Total Engineering Process Currently

Includes :

ProjectManager

CustomerWith Money

AndPerceived Need

CustomerWith

Expectation

Product

ManufactureDetail Design

The Woolly Bit

BAE SYSTEMS

The total complexity ofthe system exceeds

one person’s ‘Brainful’

ComplexityScaleWidth

BAE SYSTEMS

The Concept of Left Shift

BAE SYSTEMS

£Cost

ofChanges

Production Stage

specificationsdrawings

interface specstest specsschedule

procurement specspurchase orders

packagingtest equipment

toolingreviewing

design proving testsoperational trials

EMC testsenvironmental trials

cost estimatessimulation and modelling

component selectionreliability assessment

safety assessmentdesign certificates

pink wire modsconfiguration management

TimeDesign Stage

concept designplans/strategies

estimatesrequirements

analysis/modelling

Late Changes => Bigger Impact

BAE SYSTEMS

Systems Engineering Generic Activity Sequence (SEGAS)

RBD FBD SBD PD DD

Customer

AcceptanceTRRSRR FDR SDR PDR CDR

Imp T&I A&C

FCA

PCA

3A 3B 4 5,6,7

Typical Phase Review correspondencefor a development programme

BAE SYSTEMS

System / Sub-System Interaction

SYSTEMREQUIREMENTS

RBD FBD SBD PD DD P

INTEGOFSUB-SYS T&I A&C

FCAPCA

FULLTRR

PRELIMTRR

SUB-SYSTEMREQUIREMENTS

PDR CDR

HIGHER LEVEL CONTAINING SYSTEM DELIVERSYSTEM

SYSTEM

ImpM

SUB-SYSTEM

COMPONENTS

SRR FDR SDR PDR CDR

RBD FBD SBD PD DD P T&I

FCAPCASRR SDR PDR CDR

SUB/SYSTTRR

A&C

DELIVERSUB-SYSTEM

Imp

FDR

M

BAE SYSTEMS

The Basic RFS Loop

System Analysis& Control(Balance)

Requirements Loop

Design Loop

Verification

RequirementsAnalysis

Functional Analysisand Allocation

Design Synthesis

Process Input- Requirements

Process Output- System Architecture- Specs and Baseline

SystemAnalysis and

Control

BAE SYSTEMS

The Core Design Process - 1

R F

S

S = C + D

CustomerRequirements

System RequirementsSpecification

System RequirementsSpecification

System FunctionalStructure

System ResponseSpecification

Sub SystemRequirementsSpecifications

SystemAcceptance

Specification

Integration andTest Specifications

BAE SYSTEMS


R F

Cust Req

Sys Req Spec

Sys Req Spec Sys Fun Struc

Sys Resp Spec

Sub Sys Req Specs

Sys Acc Spec

Int & Test Specs

Sys Req Spec

C D

Sys Fun Struc

Chosen Sol

BAE SYSTEMS


R F

Cust Req

Sys Req Spec

Sys Req Spec

Sys Fun Struc

Sys Resp Spec

Sub Sys Req Specs

Sys Acc Spec

Int & Test Specs

Sys Req Spec

C D

Sys Fun Struc

Chosen Sol

Sol Concs

Sys Fun Struc

Concerns

Sol Concs

BAE SYSTEMS

• Concurrency reduces the risk all round

Bid

System Engineer/Design

Procure,Manufactureand Test

Deliver

Contract

Supra SystemEngineer

Research

Maintain

Operate

Train

Accept

ProcureSystem(s)

In Service Use(User)

Procure(Customer)

Develop System(Contractor)

AppliedResearch

RiskMitigation

Feedback

Support

Replace or Upgrade

The Product Lifecycle

BAE SYSTEMS

Design andSpecification

Manufacture Parts

Integrate and Test

TIMELEVEL

The ‘V’ Diagram

BAE SYSTEMS

The ‘V’ Diagram - cont

Tested andPartially-ProvenSystem

AcceptValidated Systemand Sub Systems

Customer Equipment andOperational Environment

Customer'sDevelopment

Activities

SystemEngineering

Activities

TrialsIntegrate withCustomer'sEquipment

Integrateand TestSystem

ResponseSpecificationand Drawings

System Reqts Spec

Sub System Reqts Spec


TIMELEVEL


BAE SYSTEMS


Tested andPartially-ProvenSub System





Activities

SystemEngineering

Activities

Sub SystemEngineering

Activities



Integrateand Test

Sub Systems



Building Block Reqts Spec

System Reqts Spec



TIMELEVEL


BAE SYSTEMS


Detail Drawings and Plans

Tested andPartially-ProvenBuilding Blocks






Activities

SystemEngineering

Activities


Activities

DesignBuildingBlocks Test

BuildingBlocks



Integrateand Test

Sub Systems





System Reqts Spec



TIMELEVEL


BAE SYSTEMS



BuildingBlocks

Tested andPartially-ProvenBuilding Blocks






Activities

SystemEngineering

Activities


Activities

DesignBuildingBlocks

ProduceBuildingBlocks

TestBuildingBlocks



Integrateand Test

Sub Systems





System Reqts Spec



TIMELEVEL

BAE SYSTEMS

The smallest System shown is at 'Building Block' level (e.g. a circuit board),made up from 'Components'

Sub Systems

System

Sub Systems

Units

Building Blocks

Components

System Hierarchy

BAE SYSTEMS

Concurrency

Highly serial, very little concurrencyHighly concurrent

• The steepness of the “V” represents the level of concurrency

BAE SYSTEMS

Refined Drawingsand Test

Equipment

The ‘W’ Diagram - cont System Specification and Manufacture


AcceptValidated System



Activities

SystemEngineering

Activities


Activities

DesignBuildingBlocks



Response


System Reqts Spec



TestBuildingBlocks


Integrateand Test

Sub Systems

Specificationand Drawings



TIMELEVEL


TestBuildingBlocks


Integrateand Test

Sub Systems

Specificationand Drawings

DE

VE

LOP

ME

NT

PR

OT

OT

YP

ES

PR

OD

UC

TIO

N

RefinedDrawings

and TestEquipment

RefinedDrawings

and TestEquipment

Refined Detail Drawings and Plans

ProductionAcceptance

DeliverSystems

BAE SYSTEMS

ProductionProduction

DevelopmentDevelopmentConceptDemonstrator

ConceptDemonstrator

In order to ‘gain hindsight’ early, a concept demonstrator is builtbefore main development, shown as a narrow V

The VW Diagram

BAE SYSTEMS

The Process Model and the ‘V’ Diagram

System EngineeringProcess Model

Waterfall ‘V’ DiagramProductHierarchy

Time

(process, product, time)

BAE SYSTEMS

System Engineering Process Models

‘V’ Diagram

It Applies at Each Level in the System Hierarchy

The Process Model is Recursive

BAE SYSTEMS

Prototype Systemand Support Equipment

Plans

Other EngineeringFunctions(ProjectManagement,Production,Sub Systems etc.)

StatedRequirements,AcceptanceAgreement

Support,Resources

Sub SystemSuppliers

Management Data,Agreed Requirements andacceptance criteria,Plans,Sub System Designs and Material,Design Proving Evidence,Design Certificate

Test Equipment Requirements, Plans

Test and Support

Equipment Suppliers

Customer

CompanyInfrastructure

Sub System Requirements,Plans

Plans,System DesignProcedures, Support,Management Data World

User(Higher LevelTests/Trials)

ConstraintsComplianceEvidence

Management Data,Agreed Requirements andacceptance criteria,Plans,System Design,Design Proving Evidence,Design Certificate

FacilitiesTest Records

PerformSystem

Engineering

Project

Management Data,Agreed Requirements andacceptance criteria,, Plans,Test and Support Equipment Designs and Material, Design Proving Evidence, Design Certificate

Notes1. The diagram is schematic only a few of the inputs and outputs are shown.2. Sub system suppliers may be internal or external to own company.3. The interface to sub system suppliers mirrors that with the customer and user when shown in detail.

Records

Support

System Engineering Context Diagram

BAE SYSTEMS

AC SECUREACCEPTANCE

ANDCERTIFICATION

SUB SYSTEMENGINEERING

ANDIMPLEMENTATION

T SUPPORTHIGHER LEVELTESTS (TRIALS)

SYSTEMTEST EQUIPMENT

PROVIDEIN

SERVICESUPPORT

ISS

E

ACCEPTANCE

PROVIDE SPECIALIST DESIGN SUPPORTSS

PERFORM SYSTEM ANALYSISA

HARMONISE SUB SYSTEMIMPLEMENTATIONSH

STARTFMANAGE SYSTEM ENGINEERINGM

DESIGN REVIEWS

CREATE CANDIDATESOLUTION CONCEPTS

C

A

PERFORMFUNCTIONAL

ANALYSIS

F

I INTEGRATEAND TESTSYSTEM

D DESIGN SYSTEMAND SPECIFY

SUB SYSTEMS

R DETERMINEREQUIREMENTS

SS

M

H

SE Process Model (Level 2)

BAE SYSTEMS

PerformFunctionalAnalysis

F

PerformSystem

Analysis

A

DetermineRequirements

R

MManageSystem

Engineering

CreateCandidateSolutionConcepts

ProvideSpecialist

DesignSupport

Integrate andTest System

Perform System Engineering

HarmoniseSub Systems

Implementations

SupportHigher LevelTests(Trials)

C SS I AC

Design Systemand Specify

Sub Systems

D H T

SecureAcceptance

andCertification

LEVEL 1

LEVEL 2Provide

In ServiceSupport

ISS

Level 3

Level 4

BAE SYSTEMS

R

Specify andAgree SystemRequirements

Specify andAgree SystemAcceptance

Criteria

Determine Requirements

Preparefor R

CaptureRequirements

R1 R2 R3 R4 R5

Identify required skillsand personnel

Select methodsand tools to managerequirements

Produce plan, workbreakdown, andprogramme

Produce costestimates

Establish pointsof contact withcustomer/userorganisation

1.1

1.2

1.3

1.4

1.5

Define Supra Systemand interfaces

Define required functions(see F2)

Determinerequired performance

Determine constraintson the system

Determine supportrequirements

Determine cost,numbers and timescale

Determine customer’sselection criteria

Determine customer’srequirements forDesign Proving

Determine non customerrequirements

Collect and collaterequirement data

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

2.10

Analyse requirementsdata for completeness

Analyse functionalrequirements(see F2, F3)

Use modeling andsimulation to analyserequirements(see A)

Develop understandingof requirements

Explore impact ofnon-compliance

Refine requirements

Highlight risks

3.1

3.2

3.3

3.4

3.5

3.6

3.7

Determine requirementspecification format

Produce requirementspecification

Demonstrate traceabilityfrom higher levelspecifications

Review, agree andcontrol requirementspecification

4.1

4.2

4.3

4.4

Determine conditionsfor acceptance

Identify customersupplied items

Produce systemacceptance specification

Review and agreesystem acceptancespecification

5.1

5.2

5.3

5.4

AnalyseRequirements

BAE SYSTEMS Overview of Systems Engineering at BAE SYSTEMS & ALENIA MARCONI SYSTEMS...

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