Engineering Design

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Engineering Design
George E. Dieter Mc Graw Hill
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Product Design Process
Definition of Design
Design establishes and defines solutions
to and pertinent structures for problems
not solved before, or new solutions to problems
which have previously been solved in a different
way
The ability to design is both a science and an art
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The four Cs of Design
Creativity Requires the creation of something
that has not existed before or not existed in the
designers mind before Complexity Requires
decisions on many variables and
parameters Choice Requires making choices
between many possible solutions at all levels,
from basic concepts to smallest
detail Compromise Requires balancing multiple
and sometimes conflicting requirements
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Static vs. Dynamic Products
Static Changes in design concept take place over
a long period of time rather incremental changes
occur at the subsystem and component
levels Automobiles, Refrigerators,
Dishwashers Dynamic Change the basic design
concept fairly frequently as the underlying
technology changes Computers, Telecommunications,
Software
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The design Process
General Information
Specific Information
Design Process
Outcome
NO
YES
Evaluate
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Scientific vs. Design Method
Existing Knowledge
State of the Art
Scientific Curiosity
Identification of need
Hypothesis
Conceptualization
Logical Analysis
Feasibility Analysis
Proof
Production
Scientific Method
Design Method
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Problem Solving Methodology
Definition of the Problem Gathering of
Information Generation of Alternative
Solutions Evaluation of Alternatives Communicati
on of the Results
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Considerations of good Design
Design Requirements Life Cycle
Issues Regulatory and Social Issues
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I. Conceptual Design
Define Problem Problem Statement Benchmarking Qu
ality Function Deployment (QFD) Product Design
Specification (PDS)
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I. Conceptual Design
Gather Information Internet Patents Trade Litera
ture
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I. Conceptual Design
Concept Generation Brainstorming Functional Deco
mposition Morphological Chart
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I. Conceptual Design
Evaluation of Concepts Pugh Concept
Selection Decision Matrix
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II. Embodiment Design
Product Architecture Arrangement of Physical
Elements to carry out Function
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II. Embodiment Design
Configuration Design Preliminary Selection of
Parts and Materials Modeling and Sizing of Parts
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II. Embodiment Design
Parametric Design Robust Design Tolerances Final
Dimensions Design for Manufacturability (DFM)
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III. Detail Desigm
Detail Design Detailed Drawings Detailed
Specification
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IV. Planning for Manufacture
Designing Specific Tools and Fixtures Specifying
the Production Plant and Production
Lines Planning the Work Schedule and Inventory
Control Planning the Quality Assurance
System Establishing the Standard Time and Labor
Costs Establishing the System Information Flow
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V. Planning for Distribution
Shipping Package Documentation Shelf
Life Warehouses
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VI. Planning for Use
Maintenance Reliability Product
Safety Convenience in Use (Human
Factors) Aesthetic Appeal Economy of
Operation Duration of Service
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VII. Planning for Retirement
Useful Life Deterioration Technical
Obsolescence Fashion or Taste Environmental
Issues Industrial Ecology Green
Design RFI Power Consumption
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Marketing
Marketing Creates and Manages the companys
Relationship with its Customers Marketing
Translates Customer Needs into Product Requirement
s Marketing Defines Support Services Marketing
Studies How Customers Make Buying Decisions Marke
ting and Sales are Different
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Marketing
Early Adopters Mainstream Adopters Laggards
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Market Research
Define the Market Segment Identify the Early
Adopters Identify Competitive Products Establish
the Market Size () Determine the Breadth of
Product Line Determine the Product Price / Volume
Relationship Establish the Customer Needs and
Wants