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Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences1
Concurrent Engineering
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences2
CE Definitions:
• “The application of tools, techniques, methodologies, and behavioral initiatives used to minimise product development timescales by maximising the degree of overlap of design activities.”
• “A ‘buzz-phrase’ with a limited shelf life?”
• “Optimal design.”
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences3
Sequential Design (“over-the-fence” approach)Sequential Design (“over-the-fence” approach)Sequential Design (“over-the-fence” approach)
Concurrent DesignConcurrent Design
Centralised DesignCentralised Design
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences4
Concurrent Engineering
• Serial engineering:
– control of two parameters
• Concurrent Engineering:
– Attempt to control all three parameters
Good
Cheap
Quick
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences5
Case Study
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences6
Stringer Manufacturing
Early 1980’s A320 rate increase;
Severe capacity problems
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences7
Stringer Forming
Highly labour intensive,
Long lead times,
Quality critical.
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences8
Twisting operation
Concern over effect on
Fatigue properties !
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences9
Manufacturing Automation
Extremely costly
capital equipment; high maintenance
costs,dedicated function
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences10
Some historical
perspective…..
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences11
CE is not new; P51
DESIGNED + DEVELOPED
IN 102 DAYS
TECHNOLOGICALLY
ADVANCED
DESIGNED FOR
LOW COST
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences12
Supermarine Spitfire• Example of
CE?
– Good ?
– Cheap ?
– Quick ?
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences13
Bf 109
7000 M/hours, much emphasis
on design for Manufacture
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences14
DH 98 MosquitoArguably a good example of CE.
Much emphasis on design for
manufacture;
Use of modular assemblies,
split fuselage halves for easy equipping,
minimal use of compound curves.
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences15
Concorde
Design for performance?
Technical challenges huge, little opportunity for DFM/DFA?
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences16
How do you “do” CE?
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences17
Boeing
“It is in project management that Boeing hope to gain an advantage over Airbus in the design of the 777”*
*Sabbagh; 21st Century Jet
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences18
Boeing and CE
• Conscious and deliberate
• Planned size and number of DBTs
– (planned 80 ended up with 250)
• Highly structured meetings
– (scheduled down to the minute)
• Culture change
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences19
ESTEC Dh015
TeamLeader
CommsGS & Ops
Mechanisms
Instruments
Risks
CostSystems
PowerDHS
Structure
Thermal
Doc.’n
Simulation
Mission
Propulsion
AOCS
MULTIMEDIA WALL
Cu
sto
me
r an
d A
d-H
oc
Ex
pert
s
Cu
sto
me
r an
d A
d-H
oc
Ex
pertsConfig.
Progr.’s
The Future
Module SESA3002a; Aerospace Design
James Scanlan; School of Engineering Sciences20
The Future
ESA Concurrent
Design Facility (CDF):
