The document discusses key concepts in computer integrated manufacturing systems including CAD, CAM, CIM, automation, and lean manufacturing. Some key points: CAD involves using computers for engineering design activities. CAM uses computers for planning, managing, and controlling manufacturing functions. CIM integrates all manufacturing enterprise functions through integrated systems and data communication. CIM aims to improve organizational efficiency. Lean manufacturing aims to eliminate waste from manufacturing systems. Just-in-time production receives goods only as needed to increase efficiency and decrease inventory costs and waste.

1. ME 6703 - COMPUTER INTEGRATED MANUFACTURING SYSTEMS
TWO MARKS QUESTIONS AND ANSWERS
UNIT I
INTRODUCTION
1. Define CAD ?
Computer aided design ( CAD ) may be defined as any design activity that involves the effective use of
the computer to create, modify or document an engineering design.
2. What are system software and application software ?
 System software's are used to perform/control the operation of the computer.
 Application software's , also known as application programs , are used for general or
customized/specialized problems.
3. List the fundamental reasons for implementing a CAD system ?
 To increase the productivity of the designer.
 To improve the quality of design.
 To improve communication.
 To create a database for engineering.
4 Mention the six phases of a Shigley's design process ?
 Recognition of needs
 Identification of problems
 Synthesis
 Analysis and optimization
 Evaluation Presentation
5. What are the elements of CAD?
 Geometric modelling
 Engineering analysis
 Design Review & evaluation
 Automated drafting
6. Define CAM ?
Computer aided manufacturing ( CAM ) may be defined as an effective use of computers and computer
technology in the planning management and controls of the manufacturing function.
7. What is manufacturing planning?
In manufacturing planning, computer is used indirectly to support the production function, but there is
no direct connection between the computer and process.
8. What is meant by manufacturing control?
Manufacturing control is concerned with managing and controlling the physical operations in the
factory.

2. 9. Explain CIM ?
CIM is the integral of the total manufacturing enterprise through the use of integrated systems and data
communications coupled with new managerial philosophies that improves organizational and personnel
efficiency.
10. List the various components of CIM ?
 Computer Aided Design ( CAD )
 Computer Aided Manufacturing ( CAM )
 Computer numerically controlled machine ( CNC )
 Flexible manufacturing system ( FMS )Robotics
 Automated material handling system ( AMHS )
 Group technology
 Computer aided process planning ( CAPP )
 Manufacturing resource planning
 Computer control system
11. What are the benefitsofusingCIM?
 Make the total process more productiveand efficient.
 Increases product reliability.
 Decrease the cost of production and maintenance relating to the manufacturing system as well as to the
product.
12. Definethe productdevelopmentlifecycle?
The product life cycleis the period of time overwhich an item is developed, brought to market and eventually
removed from the market.
13. What are the types ofproductionsystem?
 Mass production
 Batch production
 Job production
14. What is meant by productionrate?
Productionrate fora individual processing is the number of goods that can be produced during a given
period of time(piece/hr).
15. Defineproductioncapacity
Productioncapacity is defined as the maximum rate of output that a production facility is able to
produce under a given operating conditions.
PC = n Sw Hsh Rc
16. What do youunderstandbythe term utilization?
Utilization refers to the amount of output of a production facility relative to its capacity. Itis usually
expressed as a percentage.
U = N / PC

3. 17. What is meant by concurrentengineering?
 Concurrent engineering is a method by whichseveral teams within an organization work
simultaneously to develop new products and services.
 By engaging in multiple aspects of development concurrently, the amount of time involvedin getting a
new product to the market is decreased significantly.
18. DefineAutomation
Automation is the technology by whicha process is accomplished withouthuman assisatnce.
19. List out the basicelementsofan AutomatedSystem
 Power- To accomplish the process and operate the system.
 Program of instructions - To direct the process.
 Control system - To actuate the instructions.
20. What are the goals of automation in manufacturing industry ?
 Process Integration
 Improve Productivity
 Economize on floor space
 Reduce human involvement and Work piece damage
 Improve quality
21. Give the classification of automation ?
 Fixed automation
 Programmable automation
 Flexible automation
22. What are the benefits of automation ?
 To increase labour productivity.
 To reduce labour cost.
 To mitigate the effects of labour shortages.
 To reduces or eliminate routine natural and clerical tasks.
 to improve worker safety.
23. DefineLeanManufacturing
Lean manufacturing or lean production is a systematic method forthe elimination of waste ("Muda") within a
manufacturing system.
24. What are the benefitsofLean Manufacturing?
 Lowerlevels of Inventory.
 Improved quality.
 Increased overallproductivity.
 Reduced manufacturing lead time
25. What is meant by Just-In-TimeProduction?
Just-in-time production is an inventory strategy companies employ to increase efficiency and decrease
waste by receiving goods only as they are needed in the production process, thereby reducing inventory costs.
This method requires producers to forecast demand accurately.