V K Jadon discusses design philosophy and process. There are different types of design problems including well-defined and ill-defined, and different types of designs such as adaptive, developmental, and new designs. The design process involves 3 phases - concept generation and analysis, detail design, and testing and manufacturing. Other factors that influence design include ergonomics to ensure products are compatible with human capabilities, as well as considerations for robustness, concurrent engineering, aesthetics, environment, economics and other factors.

1. Design Philosophy
V K Jadon
V K Jadon, Professor, Mechanical Engineering

2. V K Jadon, Professor, Mechanical Engineering
Design Cycle
Type of Design
Design Process
Other Considerations

3. Design Cycle
Well-defined
Ill-defined problem
 The air bags of the car are not inflating when an accident take place.
 The bush of the lever is failing.
 The backrest of the chair is not comfortable.
 There has been too much rush on the national highways.
 Many incidents of car fires are reported in recent past.
 There have been many deaths reported due to road accidents.
New Need
Technology
Change
New Design
V K Jadon, Professor, Mechanical Engineering
Machine design is defined as process of inventing or innovating creative ideas
which after synthesis and analysis may be brought up into reproducible physical
form at competitive price and quality, operating within the specified conditions.

4. Types of design
Adaptive design
Developmental design
New design
Design Process
Interaction between need
raiser and design team
Phase-1:
Concept generation,
synthesis and analysis
Phase-2:
Phase-3: Testing and
manufacturing
Problem
specification
Detail design
Final product
Generation and evaluation of concepts
Synthesis
Modeling and analysis
Detailed design
Prototype model testing and review
Manufacturing
Need
Feasibility Study Market Research
Design Specification
Phase-1
Phase-2
Phase-3
V K Jadon, Professor, Mechanical Engineering

5. V K Jadon, Professor, Mechanical Engineering
Ergonomics enables the designer to create the products which are
compatible with human capabilities (both physical and mental)
Physical: stress levels, fatigue, endurance, load lifting capacity,
energy expenditure etc.
Mental: perceptual and information processing abilities,
reaction time abilities, decision making abilities etc.
Design for Ergonomics
According to Mckormick & Sanders ‘Ergonomics discovers
and applies information about human behavior, abilities,
limitations and other characteristics to the design of tools,
machines, systems, tasks, jobs and environments for
productive, safe, comfortable and effective human use

6. V K Jadon, Professor, Mechanical Engineering
DESIGN FOR ROBUSTNESS
CONCURRENT ENGINEERING
REVERSE ENGINEERING
AND REDESIGN
REENGINEERING
DESIGN ASSESSMENT TOOLS
DESIGN FOR VALUE
DESIGN FOR AESTHETICS
DESIGN FOR ENVIRONMENT
DESIGN FOR ECONOMICS