design Engineering module1 ktu seme.pptx

design Engineering module1 ktu seme.pptx

• 2.
  •ENGINEERING •Engineering is theapplication of scientific, economic, social and practical knowledge in order to invent, build, design, develop and maintain various devices, systems, machines, structures and processes. •DESIGN •A plan or drawing produced to show the look and function or workings of an object before it is made. •ENGINEERING DESIGN ►Engineering design is the process of devising a system, component, or process to meet desired needs. ►It is an iterative design making process in which the basic sciences, mathematics and engineering sciences are applied to optimally convert resources to m eet a stated objective.
• 3.
  • DESIGN LEVELS •ADAPTIVE DESIGN ►Mostly designer's work will be concerned with the adaptation of existing designs. ►There are branches of manufacturing in which development has practically ceased, so that there is hardly anything left for the designer to do except make minor modifications, usually in the dimensions of the product. ►Design activity of this kind demands no special knowledge or skill, and the problems presented are easily solved by a designer with ordinary technical training. ►Example: Elevator, Washing Machine etc.
• 4.
  •DEVELOPMENT DESIGN ►Considerably morescientific training and design ability are needed for development design. ►The designer starts from an existing design, but the final outcome may differ markedly from the initial product. ►Example: Development could be from a manual gearbox in a car to an automatic one, from the traditional tube-based television to the modern plasma and LCD versions, Wired telephone to mobile phone etc.
• 5.
  •NEW DESIGN ►Only asmall number of designs are new designs. This is possibly the most difficult level in that generating a new concept involves mastering all the previous skills in addition to creativity and imagination, insight, and foresight. ►Example: Design of the first automobile, airplane, camera etc.
• 6.
  •CAUSE FOR FAILURESIN MOST ENGINEERING DESIGNS • � Incorrect or overextended assumptions • � Poor understanding of the problem to be solved • � Incorrect design specifications • � Faulty manufacturing and assembly • � Error in design calculations • � Incomplete experimentation • � Error in drawings • ‘? Inadequate data collection
• 7.
  PHASES OF DESIGNPROCESS
• 8.
  • Identifying Customerneeds • Client request: ►Aclient maysubmit a request for developing a productor artifact. ►The customerneed should be expressed clearly. ►The client mayknow only the type of product that they need. • Modification of an existing design ►Client may ask modifications in the existing product. ►They may ask for customization in certain products. ►They may ask to change shape, functional ties, material used etc. ►Example: Different coffee brands uses different flavours, • Generation of new product ►Profit oriented companies always do research to generate entirely new concepts and products so that they can rule the market. ►Example: Design variants of televisions with new features and build materials.
• 9.
  2. Setting designobjectives :- • Identify the design objectives. • Perform feasibility analysis, • market study and document the finalized design objectives. • Conduct feasibility Analysis ►Technical feasibility: ►Economic feasibility: ► Schedule feasibility: ►Social feasibility:
• 10.
  •Perform market analysis ►Analyzethe market and identify the competing products and its exciting features. ►Identify the supplementary features that may be expected from this product. •Document the finalized design objectives ►Document all the finalized requirements/ design objectives. ►This document act as an agreement between the customer and the manufacturer. ►Example: System Requirement Specification {SRS) document.
• 11.
  Identifying design constraints– Identify the various constraints that exist which may affect the design process. Functional constraints ►These constraints impose a limit on the proposed working principle of the product ►Example: Energy requirement, Materials used, Overall geometry and aesthetics etc. Manufacturing constraints ►The direct production limitations are due to equipment/raw materials deficiency, methods involved in manufacturing, labour shortage etc.