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Phases of Engineering Design

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					                   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
                                    Problem Definition
(Client statement ?)



                                    Conceptual Design



                                    Preliminary Design



                                     Detailed Design

     Final Design
     (Fabrication                       Design
   Specifications &                  Communication
   Documentation)


      Main Phases of the Engineering Design Process
Need Identification
    Need Identification
                                       Problem Definition
    (Client statement ?)
(Client statement ?)

                                       Conceptual Design



                                       Preliminary Design



                                        Detailed Design

        Final Design
        (Fabrication                       Design
      Specifications &                  Communication
      Documentation)


         Main Phases of the Engineering Design Process
                                     Problem
Need Identification
(Client statement ?)                Definition
                                    Problem Definition



                                    Conceptual Design



                                    Preliminary Design



                                     Detailed Design

     Final Design
     (Fabrication                       Design
   Specifications &                  Communication
   Documentation)


      Main Phases of the Engineering Design Process
        Problem Definition
                                                Methods:
                                                Objectives tree
    Input:
Sources of Information:                         Function-means tree
    Client’s statement                          Requirements matrix
Literature on the state-of-the art
Experts
    Tasks:
Standards and codes
    Clarify design
Regulations objectives (1) (2)
    Establish user requirements
   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
                                    Problem Definition
(Client statement ?)

                                  Conceptual
                                   Conceptual Design
                                     Design
                                    Preliminary Design



                                     Detailed Design

     Final Design
     (Fabrication                       Design
   Specifications &                  Communication
   Documentation)


      Main Phases of the Engineering Design Process
     Conceptual Design                             Sources of
                                                   Information:
                                                   Competitive products
                        Input:
       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:
     ConceptualBrainstorming, synectics and
                design(s)
               analogies,
     Design specifications benchmarking and
               reverse engineering
Need Identification
                                    Problem Definition
(Client statement ?)



                                    Conceptual Design


                                  Preliminary
                                   Preliminary Design
                                     Design
                                     Detailed Design

     Final Design
     (Fabrication                       Design
   Specifications &                  Communication
   Documentation)


      Main Phases of the Engineering Design Process
     Preliminary Design Means:
                                        Laboratory experiments,
                                        prototype development,
Input:                                  simulation and computer analysis
Conceptual design(s)
Sources of Information:
Design specifications
Rules of thumb
Simple models
Known physical relationships
Tasks:
Model and analyze conceptual design (7)
Test and evaluate conceptual design (8)



                  Methods:
     Output:       Refined objectives tree
                   Comparison charts
     A selected design
     Test and evaluation results
Need Identification
                                    Problem Definition
(Client statement ?)



                                    Conceptual Design



                                    Preliminary Design



                                  Detailed Design
                               Detailed Design
     Final Design
     (Fabrication                       Design
   Specifications &                  Communication
   Documentation)


      Main Phases of the Engineering Design Process
       Detailed Design

Input:            Means:
A selected design Formal review
                  Public hearing
Test and evaluation results


Tasks:                                      Methods:
    Sources of Information:
Refine and optimize the chosen design (9)   CADD-Computer Aided
   Design codes                             Design and Drafting
   Handbooks
   Local laws and regulations
    Output:
   Suppliers’ component
    Proposed manufacturing
    specifications
   specifications for
    Final design review
    client
Need Identification
                                    Problem Definition
(Client statement ?)



                                    Conceptual Design



                                    Preliminary Design



                                     Detailed Design

     Final Design
     (Fabrication                    Design
                                      Design
   Specifications &                Communication
   Documentation)                Communication
      Main Phases of the Engineering Design Process
 Design Communication

Input:
Manufacturing specifications


                       Sources of Information:
Tasks:                 Feedback from clients and users
Document the completed design (10)




    Output:
    Final report to client
    containing manufacturing
    specifications

				
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posted:9/15/2011
language:English
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