# DESIGN 1 DPT224 TOPIC 1: INTRODUCTION TO ENGINEERING DESIGN.

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DESIGN 1 DPT224 TOPIC 1: INTRODUCTION TO ENGINEERING DESIGN

Objectives  By the end of this topic, students should be able to: Define engineering design Differentiate between modes or levels of engineering design List the reasons for failures in engineering design Explain constraints in engineering design

Engineering Design  Design is a creative process  Design is exciting, challenging, satisfying and rewarding

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Engineering Design  Formal definition of engineering design based on ABET:  “Engineering design is the process of devising a system, component or process to meet desired needs”  It is a iterative decision-making process in which the basic of sciences, mathematics and engineering sciences are applied to convert resources optimally to meet a stated objective.

Engineering Design  Development of student creativity  Open ended problems  Application of modern design theory  Formulation of design problem  Solution of the design problem using state of the art method and tools  Consideration of economic factors, reliability, aesthetics, ethics and social impact

Levels of engineering design  It measures the degree of design difficulty.  There are three stages: Adaptive design Developed design New design

Levels of engineering design  Adaptive design level: Adaptation of existing design Minor modifications usually in term of dimensions No special skill or knowledge is required

Levels of engineering design  Development design: Starts from an existing design, but the final outcome may differ from the initial product Require more scientific training and design ability  New design: Totally new design (from scratch)

Failures in engineering design  Some of disasters in engineering design: Chernobyl nuclear power plant Challenger space shuttle Lost of engine and crash of a DC 10 airplane in 1979 MRR2 (Malaysian Scenario) ???

Reasons for failures in engineering design  Incorrect or overextended assumptions  Poor understanding of the problem to be solved  Incorrect design specifications  Faulty at manufacturing and assembly  Error in design calculations  Incomplete experimentation and inadequate data collection  Errors in drawings  Etc

Engineering constraints  Consideration constraints that may restrict our choices. Economic Environmental Ethical and Legal Health and Safety Manufacturability Political and Social – FDA, language? Sustainability

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