lect-ch 2-design and concurrent engg
TRANSCRIPT
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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