CIM

Question 1

Objectives of CIM

Answer 1

Simplify production processes, product design, and factory organisation.

Automate production processes and business functions that support them with computers, machines and robots.

Integrate all production and support processes using computer networks, cross functional business software and other information technologies.

Question 2

CAD,CAP,CAM,CAQ

Answer 2

Computer Aided Design and Manufacturing

CAD- Computer Aided Design

CAP- Computer Aided Process planning

CAM- Computer Aided Manufacturing

CAQ- Computer Aided Quality control

Question 3

Activities of CIM (PP&C)

Answer 3

Product planning and control - organisational activity of CIM

• Manufacturing resources planning
• Material requirement planning
• Lot sizing & time phasing
• Order release
• Manufacturing control

Question 4

What is the Concept of CIM?

Answer 4

Linking all engineering functions of CAD/CAM together including company’s business functions which support manufacturing

All production related functions are incorporated in an integrated computer system to assist and automate operations.

Question 5

Concept of CIM processes

Answer 5

• Customer order spec entered in the order entry system
• Product design using CAD
• Compile bill of materials, assembly drawings etc
• Process planning, tool design etc to prepare for production
• Production planning, material requirement planning and scheduling
• Manufacturing and shipping.

Question 6

CAD

Answer 6

Computer Aided Design
To support the design engineering function effectively using a computer to create modify, analyse and document:

• Design Productivity
• Quality of design
• Quality of design documentation
• Generation of manufacturing data
• Design standardisation

Question 7

What is CAM

Answer 7

Computer Aided Manufacturing

To support manufacturing engineering activities by effective use of computer technology

Question 8

CAM (Manufacturing Planning)

Answer 8

Indirect support of production for effective planning and management of production activities

• Process planning - route sheet
• Numerical Control part programming
• Machinability data systems (speeds, feeds)
• Work Standards (time standards for direct labour jobs)
• Cost estimation
• Production and inventory planning
• Line balancing

Question 9

CAM

Manufacturing Control

Answer 9

• Process monitoring
• Quality control
• Shopfloor control
• Inventory control
• Just-In-Time systems

Question 10

What is CAP, and what are it’s benefits?

Answer 10

Computer Aided Process Planning
The direct link between design and manufacturing

Benefits

• Process rationalisation and standardisation
• Lead time reduction of process planning
• Improved legibility
• Incorporation of other application programs

Question 11

Subsystems of CIM

Answer 11

Subsystems need to be integrated

• Business planning and support
• Product design
• Manufacturing process planning
• Process automation and control
• Production monitoring system

Question 12

Subsystems main functions

Answer 12

-Business planning functions
forecasting, scheduling, material requirements planning, invoicing, accounting

-Business execution functions
production/process control, material handling, testing/inspection of the system

Question 13

FMS

Answer 13

Flexible Manufacturing System

Integration of all major elements of manufacturing into a highly automated system

• Manufacturing cells/workstations
• Automated material handling, transport and storage system
• Control system interfaced by a central computer

Question 14

Cellular Manufacturing

Answer 14

Flexibility to produce a high variety of low demand products

Question 15

Types of FMS

Answer 15

• Single machine manufacturing cell
• Flexible manufacturing cell (FMC)
• Flexible manufacturing system (FMS)

Question 16

Benefits of FMS

Answer 16

• Increased machine utilisation
• Reduced factory floor space requirement
• Ability to produce in small batch size
• Reduced inventory
• Shorter manufacturing lead times with fast changeover (tooling)
• Reduced direct labour requirements

Question 17

Issues with FMS

Answer 17

• High capital investment required
• Extensive computerisation can lead to confusion and inefficiency
• Proper process planning and scheduling is paramount
• Management of FMS requires a skilled work force

Question 18

Experience with FMS

Answer 18

Consensus from many companies in industry is

• More often than not, a smaller, simpler modular and less expensive system is more cost effective
• Flexible manufacturing cells and stand-alone machining centres are easier to control than FMS

Question 19

CIM definition

Answer 19

“CIM is the intergration of total manufacturing enterprise by using integrated systems and data communication coupled with managerial philosophies that improve organisational and personnel efficiency”

Question 20

New Manufacturing Enterprise Wheel

Answer 20

Customer- plays a central role with evolving customer needs

People, Teamwork, Organisation- Ensuries teamwork and co-operations by organising, hiring, training, motivating and communicating

Shared Knowledge and Systems- Focus on corporate knowledge, systems, and common data to support people and processes

Key Processes- 15 key processes from product definition through manufacturing and customer support

Resources and Responsibilities- Resources are inputs, Responsibilities are obligations

Manufacturing Infrastructure- Suppliers, competitors, distributors, financial markets, communities, governments, education and research facilities

Question 21

Potential issues of CIM

Answer 21

• Can be costly and difficult to implement
• Requires throrough understanding of the technology and insight to see impact on the entire business
• Communication between computers, machines and control systems is crucial and not trivial
• Requires accurate data on shared-user database product data, production data, operational data, resource data