Introduction to Design: The Process Session 3 Design Definition - PowerPoint PPT Presentation

Introduction to Design: The Process Session 3

Design Definition Engineering design is the process of devising a system, component, or process to meet desired needs. It is a decision-making process g p (often iterative), in which the basic sciences, mathematics, and the engineering sciences mathematics, and the engineering sciences are applied to convert resources optimally to meet these stated needs meet these stated needs. ABET 2009-2010 Criteria for 2 Accrediting Engineering Programs Session 3

…students must attain: � an ability to design a system, component, or process to meet desired needs within realistic constraints such as economic, , environmental, social, political, ethical, health and safety, manufacturability, and health and safety, manufacturability, and sustainability. ABET 2009-2010 Criteria for 3 Accrediting Engineering Programs Session 3

Session 3 Iterative Schematic 1 Karsnitz, J.R. 4

Iterative Schematic 2 http://www.nasa.gov/audience/ foreducators/plantgrowth/refer ence/Eng_Design_5-12.html 5 Session 3

ID of Need/Problem � Based on client � Seek to understand � Understand “real” need Understand real need – Perceived vs. reality � Evaluate assumptions � Evaluate assumptions � No bias or assumed solutions � Problem definition 6 From Strong Session 3

Gather Information � Diverse requirements and information � Don’t re-invent the wheel – Published; patent; internet; standards or codes; � Environmental, social, ethical… � Similar problems? � Similar problems? � Who has expertise? 7 From Strong Session 3

General Concepts � Creative stage � Team work � Preliminary and conceptual Preliminary and conceptual – Anything goes � Generate not evaluate � Generate, not evaluate � Deliverable: Portfolio 8 From Strong Session 3

Decide � Narrow designs – Objective criteria – Criteria weights – Engineering analysis E i i l i – i.e., weight, cost, efficiency, recyclable � Justify decision J tif d i i 9 From Strong Session 3

Detailed Engineering � Full engineering analysis � Requires detail and documentation – Reproduce or check calculations – Component selection – Drawings – Testing T i 10 From Strong Session 3

Implement � Large systems – Proof-of-concept model – Tests most critical aspects � Smaller systems – Prototype – Fully functional product or system 11 From Strong Session 3

Iteration � Re-visit previous stages – New information – Unexpected results – New ideas N id – Changing market – Team dynamics – Team dynamics � Multiple times? 12 From Strong Session 3