LECT-Ch 2-Design and Concurrent Engg

7/30/2019 LECT-Ch 2-Design and Concurrent Engg

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ES488a - CAD/CAM 1998 R. O. Buchal

Design and Concurrent Engineering


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Trends in Product Development

Increased variety, mass customization

Increased focus on customer requirements

Decreased product lifecycles

Increased product complexity

Decreased time to market

More design by suppliers


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Shrinking Product Lifetimes

1970s 1980s 1990s


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In the Past...

Instructions to supplier:

Here are the engineering drawings for a set of brakes.

Supplier submits bid, and if accepted makesbrakes according to the drawings


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Today

Instructions to supplier:

Design a set of brakes that can stop a 2200 pound car from60 miles per hour in 200 feet ten times in succession without

fading. The brakes should fit into a space 6 x 8 x 10 at theend of each axle and be delivered to the assembly plant for

$40 a set.

Supplier submits design specifications and

prepares a prototype for testing.


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Committed Vs. Actual Cost

Cost

Committed

Cost

Committed

Cost

Actual Cost

Actual Cost

Concept Design Manufacturing Support


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Allocation of Resources

Concept Design Manufacturing Support

TraditionalTraditional

World

Class

World

Class


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Distribution Of Design Changes

21 12 33 ProductionbeginsMonths

Num

berofDesign

Changes Company 1

90% of Total

changescomplete

Company 2


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Role Of Design Engineer

No longer totally responsible for product design

Responsible for more than what was traditionally

considered design Merging of design engineer and manufacturing

engineer


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Design For Manufacture

Design a product for easy & economical

production

Consider manufacturability early in the designphase

Identify easy-to-manufacture product-design

characteristics

Use easy to fabricate & assemble components Integrate product design with process planning


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Breaking Down Barriers


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The Traditional Product Development

Process

Customer requirements

(sales and marketing)

Conceptual design

(Industrial designers)

Support and

Service

Distribution

and SalesManufacturing

Detailed design

and analysis

(engineering)

Disposal

(not our problem)


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Concurrent Product Development

Customer

Sales Manufacturing

Design

Support Engineering


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Concurrent Engineering

Simultaneous decisionmaking by design teams

Integrates product design & process planning

Details of design more decentralized Needs careful scheduling - tasks done in parallel


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Concurrent Engineering Teams

Interdisciplinary, cross-

functional

Includes customer,

marketing, design,engineering,

manufacturing, sales,

support

Concurrent engineering

teams are physicallycolocated to promote

collaboration


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Activity C

Activity B

Sequential Vs. Concurrent Product

DevelopmentActivity A

Time to market

Sequential

Concurrent

Competitive

Advantage!


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Conventional Collaboration

Communication

face-to-face discussion, memos, telephone, whiteboard,bulletin board, wall charts, etc.

Collaboration

meetings, colocated workgroup

Knowledge management

notebooks, binders, printed reports, photocopies,drawings, forms, data files


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Geographically Distributed Teams

Company A Company B


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Geographically Distributed Teams

Transparent

global network

Enterprise data

and information

Company ACompany B


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Virtual Collaboration

Communication

fax, telephone, mail

email, discussion groups, shared whiteboard,videoconferencing

Collaboration

application sharing, shared network workspace (files inshared directories)

Knowledge management

Product data management system, documentmanagement system, distributed databases

Documents

LECT-Ch 2-Design and Concurrent Engg