Transcript Phases of Engineering Design

Lecture 4:
Phases of Engineering Design
MECE 202
PRINCIPLES OF MECHATRONICS DESIGN
Lecture Notes
Asst. Prof. Dr. Zühal ERDEN
Department of Mechatronics Engineering
Need Identification
(Client statement ?)
Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Final Design
(Fabrication
Specifications &
Documentation)
Design
Communication
Main Phases of the Engineering Design Process
Need
Identification
Need
Identification
(Client statement ?)
(Client
statement ?)
Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Final Design
(Fabrication
Specifications &
Documentation)
Design
Communication
Main Phases of the Engineering Design Process
Need Identification
(Client statement ?)
Problem
Problem Definition
Definition
Conceptual Design
Preliminary Design
Detailed Design
Final Design
(Fabrication
Specifications &
Documentation)
Design
Communication
Main Phases of the Engineering Design Process
Problem Definition
Methods:
Input:
Sources
of Information:
Client’s statement
Literature on the state-of-the art
Experts
Tasks: and codes
Standards
Clarify design objectives (1)
Regulations
Establish user requirements (2)
Objectives tree
Function-means tree
Requirements matrix
Identify constraints (3)
Establish functions (4)
Output:
Means:
Literature
review
Revised problem
statement
Brainstorming
Refined objectives
Constraints User surveys and questionnaries
Interviews
User requirements
Functions
Need Identification
(Client statement ?)
Problem Definition
Conceptual
Conceptual Design
Design
Preliminary Design
Detailed Design
Final Design
(Fabrication
Specifications &
Documentation)
Design
Communication
Main Phases of the Engineering Design Process
Conceptual Design
Input:
Sources of
Information:
Competitive products
Revised problem statement
Refined objectives
Constraints
User requirements
Functions
Methods:
Quality function deployment (QFD)
Tasks:
Morphological chart
Establish design specifications (5)
Generate design alternatives (6)
Output: Means:
synectics and
ConceptualBrainstorming,
design(s)
analogies, benchmarking and
Design specifications
reverse engineering
Need Identification
(Client statement ?)
Problem Definition
Conceptual Design
Preliminary
Preliminary Design
Design
Detailed Design
Final Design
(Fabrication
Specifications &
Documentation)
Design
Communication
Main Phases of the Engineering Design Process
Preliminary Design Means:
Laboratory experiments,
prototype development,
simulation and computer analysis
Input:
Conceptual design(s)
Design
specifications
Sources
of Information:
Rules of thumb
Simple models
Known physical relationships
Tasks:
Model and analyze conceptual design (7)
Test and evaluate conceptual design (8)
Methods:
Refined objectives tree
Comparison charts
A selected design
Test and evaluation results
Output:
Need Identification
(Client statement ?)
Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Detailed
Design
Final Design
(Fabrication
Specifications &
Documentation)
Design
Communication
Main Phases of the Engineering Design Process
Detailed Design
Input:
Means:
A selected design Formal review
hearing
Test and evaluationPublic
results
Tasks:
Sources
of Information:
Refine
and optimize
the chosen design (9)
Design codes
Handbooks
Local
laws and regulations
Output:
Proposed manufacturing
Suppliers’
component
specifications
specifications
Final design review for
client
Methods:
CADD-Computer Aided
Design and Drafting
Need Identification
(Client statement ?)
Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Final Design
(Fabrication
Specifications &
Documentation)
Design
Design
Communication
Communication
Main Phases of the Engineering Design Process
Design Communication
Input:
Manufacturing specifications
Tasks:
Sources of Information:
Feedback from clients and users
Document the completed design (10)
Output:
Final report to client
containing manufacturing
specifications