1. Lecture 4: Phases of Engineering Design
MECE 202 PRINCIPLES OF MECHATRONICS DESIGN Lecture Notes
Asst. Prof. Dr. Zühal ERDEN
Department of Mechatronics Engineering

2. 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

3. 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

4. Problem Definition Need Identification (Client statement ?)
Conceptual Design
Preliminary Design
Detailed Design
Final Design
(Fabrication Specifications & Documentation)
Design Communication
Main Phases of the Engineering Design Process

5. Problem Definition Input: Tasks: Methods: Sources of Information:
Objectives tree
Function-means tree
Requirements matrix
Input:
Client’s statement
Sources of Information:
Literature on the state-of-the art
Experts
Standards and codes
Regulations
Tasks:
Clarify design objectives (1)
Establish user requirements (2)
Identify constraints (3)
Establish functions (4)
Means:
Literature review
Brainstorming
User surveys and questionnaries
Interviews
Output:
Revised problem statement
Refined objectives
Constraints
User requirements
Functions

6. Conceptual Design Need Identification (Client statement ?)
Problem Definition
Conceptual Design
Conceptual Design
Preliminary Design
Detailed Design
Final Design
(Fabrication Specifications & Documentation)
Design Communication
Main Phases of the Engineering Design Process

7. Conceptual Design Input: Tasks: Sources of Information: Methods:
Competitive products
Input:
Revised problem statement
Refined objectives
Constraints
User requirements
Functions
Methods:
Quality function deployment (QFD)
Morphological chart
Tasks:
Establish design specifications (5)
Generate design alternatives (6)
Output:
Conceptual design(s)
Design specifications
Means:
Brainstorming, synectics and analogies, benchmarking and reverse engineering

8. Preliminary Design Need Identification (Client statement ?)
Problem Definition
Conceptual Design
Preliminary Design
Preliminary Design
Detailed Design
Final Design
(Fabrication Specifications & Documentation)
Design Communication
Main Phases of the Engineering Design Process

9. Preliminary Design Input: Tasks: Means: Sources of Information:
Laboratory experiments, prototype development, simulation and computer analysis
Preliminary Design
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
Output:
A selected design
Test and evaluation results

10. Detailed Design 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

11. Detailed Design Input: Tasks: Means: Methods: Sources of Information:
Formal review
Public hearing
Input:
A selected design
Test and evaluation results
Methods:
CADD-Computer Aided Design and Drafting
Tasks:
Refine and optimize the chosen design (9)
Sources of Information:
Design codes
Handbooks
Local laws and regulations
Suppliers’ component specifications
Output:
Proposed manufacturing specifications
Final design review for client

12. Design Communication Need Identification (Client statement ?)
Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Final Design
(Fabrication Specifications & Documentation)
Design Communication
Design Communication
Main Phases of the Engineering Design Process

13. Design Communication Input: Tasks: Sources of Information:
Manufacturing specifications
Sources of Information:
Feedback from clients and users
Tasks:
Document the completed design (10)
Output:
Final report to client containing manufacturing specifications