1 ENGINEERING DESIGN AND PRODUCTION

2 What is design? To create something that has never been. To create something that has never been. To pull together something new or arrange existing things in a new way to satisfy a recognized need of society. To pull together something new or arrange existing things in a new way to satisfy a recognized need of society. Design establishes and defines solutions to problems not solved before, or new solutions to problems which have previously been solved in a different way. A creative process which includes the synthesis of many subjects. A creative process which includes the synthesis of many subjects.

3 What is design? Design is a sequential process; Design is a sequential process; ● Exploring the alternative systems ● Formulating a mathematical model ● Specifying specific parts ● Selecting a material

4 DESIGN PROCESS

5 1. RECOGNITION OF A NEED 2. DEFINITION OF THE PROBLEM 3. ANALYSIS AND FORMULATION OF THE PROBLEM 4. LITERATURE SURVEY 5. FEASIBILITY STUDY 6. PRELIMINARY DESIGN 7. DETAIL DESIGN 9. PRODUCTION PLANNING 8. EVALUATION VIRTUAL TESTING TECHNIQUES 10. MANUFACTURING PROTOTYPE BUILDING AND TESTING

6 1. Recognition of a need Needs usually arises from dissatisfaction with the existing situation. Needs usually arises from dissatisfaction with the existing situation. > To reduce cost > To increase reliability or performance > To change

7 2. Definition of the problem The definition of the problem should include: The definition of the problem should include: > Problem statement > Objectives and goals > Definitions of technical terms > Constraints > Evaluation criteria

8 3. Analysis and formulation of the problem To design something; To design something; > Use the appropriate disciplines of science > Choose the necessary tools > Simplify it through models

9 4. Literature survey > Technical reports [ R&D ] > Company reports > Trade journals > Patents > Catalogs > Vendors’ Handbooks etc. > Library > Internet

10 5. Feasibility Study Evaluation of the solutions, Evaluation of the solutions, > Physical realizability > Economic worthwhileness > Financial feasibility > Technological realizability

11 6. Preliminary Design -Do not rush into detailed design !.. -After this step major changes become very expensive -Final station to check; > Function > Strength > Design aesthetics > Financial viability etc. > Energy > Safety - Divide the total system into functional blocks.

12 7. Detailed Design > Materials > Manufacturing Processes > Business Decisions > Marketing & Service > Retirement & Life cycle > Form & Dimensions > Tolerances & Surface Properties > Improvement > Output: Computer Model & Tech. Drawings For every functional block; For every functional block;

13 8. Evaluation > Virtual Testing Techniques - CAD / CAM / CAE > Prototype Building and Testing using laboratory facilities - Ease, cheap, fast to revise - Integration of computers into the design and production process - Simulation, Animation, FEM Analysis

14 9. Production Planning A great deal of detailed planning must be done. A great deal of detailed planning must be done. > Sales and Operation Planning > Long Term Planning > Demand Management > Materials Requirement Planning > Customer Relations

Manufacturing That is the point where the rubber meets the road !.. That is the point where the rubber meets the road !..

16 References Dieter, George E.,Engineering Design, A Materials and Processing Approach Dieter, George E.,Engineering Design, A Materials and Processing Approach