This document discusses engineering design and different types of designs. It defines engineering design as a systematic process where engineers generate and evaluate solutions to meet client/user needs within constraints. The document outlines several types of designs - original, adaptive, redesign, selection, and industrial design. It provides examples and descriptions of each type. The document also defines key concepts in design including objectives, constraints, functions, form, and means. It frames design as a process of questioning to understand goals, limits, required functions, and determining how to achieve them.

1. ENGINEERING DESIGN
S2 ME
Dept of Mechanical Engineering
Government College of Engineering BartonHill

3. Engineering design is a systematic, intelligent
process in which engineers generate, evaluate, and
specify solutions for devices, systems, or processes
whose form(s) and function(s) achieve clients’
objectives and users’ needs while satisfying a
specified set of constraints.

4. Types of Designs
• Original design or Innovative design
• Adaptive design
• Redesign
• Selection design
• Industrial design
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5. Original design
• This form is at the top of the hierarchy
• Employs an original, innovative concept to
achieve a need
• Sometimes, but rarely, the need itself be original
• Original designs occur rarely, but when occurs
they usually disrupt existing markets
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6. Adaptive design
• Occurs when the design team adapts a known
solution to satisfy a different need to produce a
novel application
• Adaptive designs involve synthesis
• Relatively common in design
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7. Redesign
• Employed to improve an existing design
• Redesign to reduce failure in service, or to
redesign a component so as to reduce its cost
• Accomplished without any change in the
working principle or concept of the original
design
• Redesign by changing some of the design
parameters, it is often called Variant design
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8. Other types of design
• Selection design
▫ Most of products employ standard components
▫ Selecting the components with the needed
performance, quality, and cost
• Industrial design
▫ Deals with improving the appeal of a product to
the human senses, especially its visual appeal
▫ More artistic than engineering
▫ Consideration of how the human user can best
interface with the product
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10. Design objective
• A feature or behaviour that we wish the design to
have or exhibit
• Not always what the design should do, but what the
design should be
• Objectives may be completely or partially achieved,
or may not be achieved at all

11. Design constraint
• A limit or restriction on the features or behaviours
of the design
• A proposed design is unacceptable if these limits
are violated
• Can be functional, safety, manufacturing,
economic, environmental etc

12. Design functions
• Things a designed device or system is supposed to
do
• Almost always involve transforming or
transferring energy, information, or material
• Includes supporting and transmitting forces, the
flow of current, the flow of charge, the transfer of
material, and so on

13. • Design means : way or a method to make a
function happen
• Form : the shape and structure of something as
distinguished from its material

14. Design - A Process of Questioning
• Objectives : Goals
• Constraints : Limits ( From where to where,
what not to. . )
• Functions : What the design has to do?
• Means : How to do. . .

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