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.
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. . .
