Engineering design

Engineering design
Types and Terminology

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

2. “ Engineering design is a thoughtful process for generating plans or schemes for devices, systems, or processes that attain given objectives while adhering to specified constraints ”

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 4

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 5

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 6

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 7

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 8

9. Design dictionary

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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