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Lecture 4: Phases of Engineering Design
MECE 202MECE 202PRINCIPLES OF MECHATRONICS DESIGNPRINCIPLES OF MECHATRONICS DESIGN
Lecture NotesLecture Notes
Asst. Prof. Dr. Zühal ERDENDepartment of Mechatronics Engineering
Need Identification (Client statement ?) Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Design Communication
Final Design(Fabrication
Specifications & Documentation)
Main Phases of the Engineering Design Process
Need Identification (Client statement ?) Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Design Communication
Final Design(Fabrication
Specifications & Documentation)
Main Phases of the Engineering Design Process
Need Identification (Client statement ?)
Need Identification (Client statement ?) Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Design Communication
Final Design(Fabrication
Specifications & Documentation)
Main Phases of the Engineering Design Process
Problem Definition
Problem Definition
Input:Client’s statement
Tasks:Clarify design objectives (1)Establish user requirements (2)Identify constraints (3)Establish functions (4)
Output:Revised problem statementRefined objectivesConstraintsUser requirementsFunctions
Sources of Information:Literature on the state-of-the artExpertsStandards and codesRegulations
Methods:Objectives treeFunction-means treeRequirements matrix
Means:Literature reviewBrainstormingUser surveys and questionnariesInterviews
Need Identification (Client statement ?) Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Design Communication
Final Design(Fabrication
Specifications & Documentation)
Main Phases of the Engineering Design Process
Conceptual Design
Conceptual Design
Input:Revised problem statement
Refined objectivesConstraints
User requirementsFunctions
Tasks:Establish design specifications (5)Generate design alternatives (6)
Output:Conceptual design(s)Design specifications
Sources of Information:Competitive products
Methods:Quality function deployment (QFD)Morphological chart
Means:Brainstorming, synectics and analogies, benchmarking and reverse engineering
Need Identification (Client statement ?) Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Design Communication
Final Design(Fabrication
Specifications & Documentation)
Main Phases of the Engineering Design Process
Preliminary Design
Preliminary Design
Input:Conceptual design(s)Design specifications
Tasks:Model and analyze conceptual design (7)Test and evaluate conceptual design (8)
Output:A selected designTest and evaluation results
Sources of Information:Rules of thumbSimple modelsKnown physical relationships
Methods:Refined objectives treeComparison charts
Means:Laboratory experiments, prototype development, simulation and computer analysis
Need Identification (Client statement ?) Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Design Communication
Final Design(Fabrication
Specifications & Documentation)
Main Phases of the Engineering Design Process
Detailed Design
Detailed Design
Input:A selected designTest and evaluation results
Tasks:Refine and optimize the chosen design (9)
Output:Proposed manufacturing specificationsFinal design review for client
Sources of Information:Design codesHandbooksLocal laws and regulationsSuppliers’ component specifications
Methods:CADD-Computer Aided Design and Drafting
Means:Formal reviewPublic hearing
Need Identification (Client statement ?) Problem Definition
Conceptual Design
Preliminary Design
Detailed Design
Design Communication
Final Design(Fabrication
Specifications & Documentation)
Main Phases of the Engineering Design Process
Design Communication
Design Communication
Input:Manufacturing specifications
Tasks:Document the completed design (10)
Output:Final report to client containing manufacturing specifications
Sources of Information:Feedback from clients and users
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