CIM Flashcards
Objectives of CIM
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.
CAD,CAP,CAM,CAQ
Computer Aided Design and Manufacturing
CAD- Computer Aided Design
CAP- Computer Aided Process planning
CAM- Computer Aided Manufacturing
CAQ- Computer Aided Quality control
Activities of CIM (PP&C)
Product planning and control - organisational activity of CIM
- Manufacturing resources planning
- Material requirement planning
- Lot sizing & time phasing
- Order release
- Manufacturing control
What is the Concept of CIM?
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.
Concept of CIM processes
- 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.
CAD
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
What is CAM
Computer Aided Manufacturing
To support manufacturing engineering activities by effective use of computer technology
CAM (Manufacturing Planning)
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
CAM
Manufacturing Control
- Process monitoring
- Quality control
- Shopfloor control
- Inventory control
- Just-In-Time systems
What is CAP, and what are it’s benefits?
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
Subsystems of CIM
Subsystems need to be integrated
- Business planning and support
- Product design
- Manufacturing process planning
- Process automation and control
- Production monitoring system
Subsystems main functions
-Business planning functions
forecasting, scheduling, material requirements planning, invoicing, accounting
-Business execution functions
production/process control, material handling, testing/inspection of the system
FMS
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
Cellular Manufacturing
Flexibility to produce a high variety of low demand products
Types of FMS
- Single machine manufacturing cell
- Flexible manufacturing cell (FMC)
- Flexible manufacturing system (FMS)
Benefits of FMS
- 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
Issues with FMS
- 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
Experience with FMS
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
CIM definition
“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”
New Manufacturing Enterprise Wheel
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
Potential issues of CIM
- 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
