Lecture 9 Concurrent Engineering

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Module SESA3002a; Aerospace Design. James Scanlan; School of Engineering Sciences. 2. CE Definitions: • “The application of tools, techniques,.
Concurrent Engineering

Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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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 Sciences

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Sequential Design (“over-the-fence” approach)

Centralised Design

Concurrent Design

Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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Concurrent Engineering • Serial engineering:

Good

– control of two parameters

Quick Cheap

• Concurrent Engineering: – Attempt to control all three parameters

Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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Case Study

Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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Stringer Manufacturing

Early 1980’s A320 rate increase; Severe capacity problems

Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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Stringer Forming

Highly labour intensive, Long lead times, Quality critical.

Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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Twisting operation

Concern over effect on Fatigue properties ! Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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Manufacturing Automation

Extremely costly capital equipment; high maintenance costs, dedicated function Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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Some historical perspective…..

Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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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 Sciences

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Supermarine Spitfire • Example of CE? – Good ? – Cheap ? – Quick ? Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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Bf 109

7000 M/hours, much emphasis on design for Manufacture Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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DH 98 Mosquito Arguably 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 Sciences

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Concorde

Design for performance? Technical challenges huge, little opportunity for DFM/DFA? Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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How do you “do” CE?

Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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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 Sciences

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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 Sciences

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The Future MULTIMEDIA WALL

Systems

Config. Structure

Team Leader

Customer and Ad-Hoc Experts

Customer and Ad-Hoc Experts

Doc.’n

Cost

Risks Progr.’s

Mechanisms

Simulation

Instruments Thermal

AOCS Propulsion

Power Mission

GS & Ops

Comms

DHS

Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

ESTEC Dh015

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The Future

ESA Concurrent Design Facility (CDF): Module SESA3002a; Aerospace Design James Scanlan; School of Engineering Sciences

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