# Presentation: 198797

## Overview of

- Systems Engineering
- at
- BAE SYSTEMS & ALENIA MARCONI SYSTEMS

- /MS115-01

**By **
**Leigh Watton**
**Friday 27th July 2001**

## The Woolly Bit

**WOOLLY BIT**

**The Total Engineering **
**Process Currently **
**Includes :**

**Project**
**Manager**

**Customer**
**With Money **
**And**
**Perceived Need**

**Customer**
**With**
**Expectation**

**Product**

**Manufacture**

**Detail Design**

*The Woolly Bit*

## The total complexity of

**the system exceeds**
**one person’s ‘Brainful’ **

## The Concept of Left Shift

## Late Changes => Bigger Impact

**Cost**
**of**
**Changes**

**Production Stage**

**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**

**Time**

**Design Stage**

**concept design**
**plans/strategies**
**estimates**
**requirements**
**analysis/modelling**

*Late Changes => Bigger Impact*

## Systems Engineering Generic Activity  Sequence (SEGAS)

**Typical Phase Review correspondence**
**for a development programme**

## System / Sub-System Interaction

## The Basic RFS Loop

## The Core Design Process - 1

## The Core Design Process - 2

## The Core Design Process - 3

**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**

## The Product Lifecycle

*The Product Lifecycle*

## The ‘V’ Diagram

- Design and
- Specification

- Manufacture Parts

- Integrate and Test

**TIME**

**L**
**E**
**V**
**E**
**L**

*The ‘V’ Diagram*

## The ‘V’ Diagram - cont

- Customer Equipment and

- Operational Environment

**System**

**Engineering**

**Activities**

**Trials**

**Integrate with**

**Customer's**

**Equipment**

**Integrate**

**and Test**

**System**

- Response

- Specification

- and Drawings

- System Reqts Spec

- Sub System Reqts Spec

- Response

- Specification

- and Drawings

## The ‘V’ Diagram - cont

- Customer Equipment and

- Operational Environment

**System**

**Engineering**

**Activities**

**Sub System**

**Engineering**

**Activities**

**Trials**

**Integrate with**

**Customer's**

**Equipment**

**Integrate**

**and Test**

**System**

**Integrate**

**and Test**

**Sub Systems**

- Response

- Specification

- and Drawings

- Response

- Specification

- and Drawings

- Building Block Reqts Spec

- System Reqts Spec

- Sub System Reqts Spec

- Response

- Specification

- and Drawings

## The ‘V’ Diagram - cont

- Detail Drawings and Plans

- Customer Equipment and

- Operational Environment

**System**

**Engineering**

**Activities**

**Sub System**

**Engineering**

**Activities**

**Design**

**Building**

**Blocks**

**Test**

**Building**

**Blocks**

**Trials**

**Integrate with**

**Customer's**

**Equipment**

**Integrate**

**and Test**

**System**

**Integrate**

**and Test**

**Sub Systems**

- Response

- Specification

- and Drawings

- Response

- Specification

- and Drawings

- Building Block Reqts Spec

- Response

- Specification

- and Drawings

- System Reqts Spec

- Sub System Reqts Spec

- Response

- Specification

- and Drawings

## The ‘V’ Diagram - cont

- Detail Drawings and Plans

**System**

**Engineering**

**Activities**

**Sub System**

**Engineering**

**Activities**

**Design**

**Building**

**Blocks**

**Produce**

**Building**

**Blocks**

**Test**

**Building**

**Blocks**

**Trials**

**Integrate with**

**Customer's**

**Equipment**

**Integrate**

**and Test**

**System**

**Integrate**

**and Test**

**Sub Systems**

- Response

- Specification

- and Drawings

- Response

- Specification

- and Drawings

- Building Block Reqts Spec

- Response

- Specification

- and Drawings

- System Reqts Spec

- Sub System Reqts Spec

- Response

- Specification

- and Drawings

## System Hierarchy

**made up from 'Components'**

*System Hierarchy*

## Concurrency

- Highly serial, very little concurrency

- Highly concurrent

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

## The ‘W’ Diagram - cont   System Specification and Manufacture

- Refined Drawings
- and Test
- Equipment

*The ‘W’ Diagram - cont   ****System Specification and Manufacture***

- Detail Drawings and Plans

- Customer Equipment and

- Operational Environment

**System**

**Engineering**

**Activities**

**Sub System**

**Engineering**

**Activities**

**Design**

**Building**

**Blocks**

**Trials**

**Integrate with**

**Customer's**

**Equipment**

- Response

- Specification

- and Drawings

- Response

- Building Block Reqts Spec

- System Reqts Spec

- Sub System Reqts Spec

**Produce**

**Building**

**Blocks**

**Test**

**Building**

**Blocks**

**Integrate**

**and Test**

**System**

**Integrate**

**and Test**

**Sub Systems**

- Specification

- and Drawings

- Response

- Specification

- and Drawings

- Response

- Specification

- and Drawings

**Produce**

**Building**

**Blocks**

**Test**

**Building**

**Blocks**

**Integrate**

**and Test**

**System**

**Integrate**

**and Test**

**Sub Systems**

- Specification

- and Drawings

- DEVELOPMENT PROTOTYPES

- PRODUCTION

- Refined
- Drawings
- and Test
- Equipment

- Refined
- Drawings
- and Test
- Equipment

- Refined Detail Drawings and Plans

## The  VW  Diagram

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

*The  VW  Diagram*

## The Process Model and the ‘V’ Diagram

- System Engineering
- Process Model

- Waterfall ‘V’ Diagram

- Product
- Hierarchy

- Time

**(process, product, time)**

## The Process Model is Recursive

- System Engineering Process Models

- ‘V’ Diagram

**It Applies at Each Level in the System Hierarchy**

*The Process Model is Recursive*

## System Engineering Context Diagram

- Prototype System
- and Support Equipment

- Plans

- Other Engineering
- Functions
- (Project
- Management,
- Production,
- Sub Systems etc.)

- Stated
- Requirements,
- Acceptance
- Agreement

- Support,
- Resources

- Sub System
- Suppliers

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

- Test Equipment Requirements,
-     Plans

- Test and Support
- Equipment Suppliers

- Customer

- Company
- Infrastructure

- Sub System
- Requirements,
- Plans

- Plans,
- System Design
- Procedures, Support,
- Management Data

- World

- User
- (Higher Level
- Tests/Trials)

- Constraints

- Compliance
- Evidence

- Management Data,
- Agreed Requirements and
- acceptance criteria,
- Plans,
- System Design,
- Design Proving Evidence,
- Design Certificate

- Facilities
- Test Records

**Perform**
**System**
**Engineering**

**Project**

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

**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.

- Records

- Support

*System Engineering Context Diagram*

## SE Process Model (Level 2)

**AC**

- SECURE
- ACCEPTANCE
- AND
- CERTIFICATION

**SUB SYSTEM**
**ENGINEERING**
- AND
**IMPLEMENTATION**

**T**

- SUPPORT
- HIGHER LEVEL
- TESTS (TRIALS)

- SYSTEM
- TEST EQUIPMENT

- PROVIDE
- IN
- SERVICE
- SUPPORT

**ISS**

**E**

**ACCEPTANCE**

- PROVIDE SPECIALIST DESIGN SUPPORT

**SS**

- PERFORM SYSTEM ANALYSIS

**A**

- HARMONISE SUB SYSTEM
- IMPLEMENTATIONS

**H**

**START**

**F**

- MANAGE SYSTEM ENGINEERING

**M**

- DESIGN REVIEWS

- CREATE CANDIDATE
- SOLUTION CONCEPTS

**C**

**A**

- PERFORM
- FUNCTIONAL
- ANALYSIS

**F**

**I**

- INTEGRATE
- AND TEST
- SYSTEM

**D**

- DESIGN SYSTEM
- AND SPECIFY
- SUB SYSTEMS

**R**

- DETERMINE
- REQUIREMENTS

**SS**

**M**

**H**

*SE Process Model (Level 2)*

## Perform System Engineering

**Perform System Engineering**

**C**

**SS**

**I**

**AC**

**H**

**T**

**LEVEL 1**

**LEVEL 2**

**ISS**

**Level 3**

**Level 4**

## R

**R**

**Determine Requirements**

**R1**

**R2**

**R3**

**R4**

**R5**