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

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

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

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

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

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

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

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

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

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

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