Day 1 Presentation NASA

1
Overview of Systems Engineering at BAE SYSTEMS
ALENIA MARCONI SYSTEMS
By Leigh Watton Friday 27th July 2001
10/29/2009/MS115-01
2
The Woolly Bit
Customer With Money And Perceived Need
Customer With Expectation
The Total Engineering Process Currently
Includes
WOOLLY BIT
Product
Project Manager
Manufacture
Detail Design
3
The total complexity of the system exceeds one
persons Brainful
4
The Concept of Left Shift
5
Late Changes gt Bigger Impact
Cost of Changes
specifications drawings interface specs test
specs schedule procurement specs purchase
orders packaging test equipment tooling reviewing
design proving tests operational trials EMC
tests environmental trials cost
estimates simulation and modelling component
selection reliability assessment safety
assessment design certificates pink wire
mods configuration management
concept design plans/strategies estimates requirem
ents analysis/modelling
Time
Production Stage
Design Stage
6
Systems Engineering Generic Activity Sequence
(SEGAS)
Typical Phase Review correspondence for a
development programme
7
System / Sub-System Interaction
8
The Basic RFS Loop
9
The Core Design Process - 1
10
The Core Design Process - 2
11
The Core Design Process - 3
Sys Fun Struc
Cust Req
Sys Req Spec
R
F
Sys Req Spec
Sys Acc Spec
Sys Fun Struc
Sys Fun Struc
Sol Concs
Sys Req Spec
Sol Concs
Sys Resp Spec
C
D
Chosen Sol
Concerns
Sub Sys Req Specs
Int Test Specs
12
The Product Lifecycle

• Concurrency reduces the risk all round

13
The V Diagram
TIME
L E V E L
Design and Specification
Integrate and Test
Manufacture Parts
14
The V Diagram - cont
Customer Equipment and
Response
Trials
Operational Environment
Specification
Integrate with
and Drawings
Customer's
Equipment
System Reqts Spec
System
Response
Engineering
Integrate
Specification
Activities
and Test
and Drawings
System
Sub System Reqts Spec
15
The V Diagram - cont
Customer Equipment and
Response
Trials
Operational Environment
Specification
Integrate with
and Drawings
Customer's
Equipment
System Reqts Spec
System
Response
Engineering
Integrate
Specification
Activities
and Test
and Drawings
System
Sub System Reqts Spec
Sub System
Response
Engineering
Integrate
Specification
Activities
and Test
and Drawings
Sub Systems
Building Block Reqts Spec
16
The V Diagram - cont
Customer Equipment and
Response
Trials
Operational Environment
Specification
Integrate with
and Drawings
Customer's
Equipment
System Reqts Spec
System
Response
Engineering
Integrate
Specification
Activities
and Test
and Drawings
System
Sub System Reqts Spec
Sub System
Response
Engineering
Integrate
Specification
Activities
and Test
and Drawings
Sub Systems
Building Block Reqts Spec
Design
Response
Building
Specification
Test
Blocks
and Drawings
Building
Detail Drawings and Plans
Blocks
17
The V Diagram - cont
Response
Trials
Specification
Integrate with
and Drawings
Customer's
Equipment
System Reqts Spec
System
Response
Engineering
Integrate
Specification
Activities
and Test
and Drawings
System
Sub System Reqts Spec
Sub System
Response
Engineering
Integrate
Specification
Activities
and Test
and Drawings
Sub Systems
Building Block Reqts Spec
Design
Response
Building
Specification
Blocks
Test
and Drawings
Building
Detail Drawings and Plans
Blocks
Produce
Building
Blocks
18
System Hierarchy
The smallest System shown is at 'Building Block'
level (e.g. a circuit board), made up from
'Components'
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Concurrency

• The steepness of the V represents the level of
  concurrency

Highly concurrent
Highly serial, very little concurrency
20
The W Diagram - cont System Specification and
Manufacture
Customer Equipment and
Response
Trials
Operational Environment
Specification
Integrate with
and Drawings
Customer's
Equipment
System Reqts Spec
Refined Drawings and Test Equipment
System
Response
Engineering
Integrate
Integrate
Specification
Activities
and Test
and Test
and Drawings
System
System
PRODUCTION
Sub System Reqts Spec
DEVELOPMENT PROTOTYPES
Refined Drawings and Test Equipment
Sub System
Response
Engineering
Integrate
Integrate
Specification
Specification
Activities
and Test
and Test
and Drawings
and Drawings
Sub Systems
Sub Systems
Building Block Reqts Spec
Design
Response
Building
Specification
Refined Drawings and Test Equipment
Test
Test
Blocks
and Drawings
Building
Building
Detail Drawings and Plans
Blocks
Blocks
Produce
Produce
Building
Building
Refined Detail Drawings and Plans
Blocks
Blocks
21
The VW Diagram
In order to gain hindsight early, a concept
demonstrator is built before main development,
shown as a narrow V
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The Process Model and the V Diagram
(process, product, time)
System Engineering Process Model
Time
Product Hierarchy
Waterfall V Diagram
23
The Process Model is Recursive
It Applies at Each Level in the System Hierarchy
System Engineering Process Models
V Diagram
24
System Engineering Context Diagram
Notes 1. 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.
User (Higher Level Tests/Trials)
Customer
Management Data, Agreed Requirements
and acceptance criteria, Plans, System
Design, Design Proving Evidence, Design
Certificate
Stated Requirements, Acceptance Agreement
Facilities Test Records
Project
Plans, System Design Procedures,
Support, Management Data
Other Engineering Functions (Project Management, P
roduction, Sub Systems etc.)
Prototype System and Support Equipment
World
Perform System Engineering
Support
Constraints
Compliance Evidence
Plans
Test Equipment Requirements, Plans
Records
Management Data, Agreed Requirements
and acceptance criteria,, Plans, Test and Support
Equipment Designs and Material, Design
Proving Evidence, Design Certificate
Sub System Requirements, Plans
Support, Resources
Company Infrastructure
Management Data, Agreed Requirements
and acceptance criteria, Plans, Sub System
Designs and Material, Design Proving
Evidence, Design Certificate
Sub System Suppliers
Test and Support Equipment Suppliers
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SE Process Model (Level 2)
ACCEPTANCE
START
F
MANAGE SYSTEM ENGINEERING
M
M
SS
SS
PROVIDE SPECIALIST DESIGN SUPPORT
R
AC
DETERMINE REQUIREMENTS
SECURE ACCEPTANCE AND CERTIFICATION
ISS
F
PERFORM FUNCTIONAL ANALYSIS
T
SUPPORT HIGHER LEVEL TESTS (TRIALS)
SUB SYSTEM ENGINEERING AND IMPLEMENTATION
PROVIDE IN SERVICE SUPPORT
D
DESIGN SYSTEM AND SPECIFY SUB SYSTEMS
I
INTEGRATE AND TEST SYSTEM
C
CREATE CANDIDATE SOLUTION CONCEPTS
SYSTEM TEST EQUIPMENT
HARMONISE SUB SYSTEM IMPLEMENTATIONS
H
H
A
E
PERFORM SYSTEM ANALYSIS
A
DESIGN REVIEWS
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Perform System Engineering
LEVEL 1
C
SS
I
AC
H
T
ISS
LEVEL 2
Level 3
Level 4
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Determine Requirements
R
R1
R2
R3
R4
R5