DESIGN 1DPT224

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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