Computer Integrated Manufacturing(CIM) Flashcards
(24 cards)
What are the objectives of CIM??
- Simplify
- Automate
- Integrate
Whats the concept of CIM
Linking all engineering functions of CAD/CAM together including any of the company’s business functions which support manufacturing
What are some of the functions of CIM(Enterprise software)?
- Customer order specification entered in the order entry system
- Product design using CAD
- Compile the bill of materials, assembly drawings etc
- Process planning, tool design etc to prepare for production
Production planning, material requirement planning, scheduling - Manufacturing and shipping
What does CAD offer in terms of CIM?
Supports the design engineering function by effective use of a computer to create, modify, analyse and document.
What does CAM offer in terms of CIM?
To support manufacturing engineering activities by effective use of computer technology.
- Process Planning
- Cost estimation
- Line balancing
- Numerical Control part programming
- Production and Inventory Planning
What are some of the subsystems which need to be integrated as a whole?
- Business planning and support
- Product design
- Manufacturing process planning
- Process automation and control
- Production monitoring system
Why are subsystems designed, developed and implemented?
They are designed, developed and implemented implemented so that the output of one subsystem serves as input of another subsystem.
What are the 2 functions subsystems are usually divided into ?
- Business planning functions
forecasting, scheduling, material requirements planning, invoicing, accounting - Business execution functions
production and process control, material handling, testing and inspection of the system
What is a Flexible Manufacturing System ?
Integration of all major elements of manufacturing into a highly automated system
Types of CIM?
- Single machine manufacturing cell
- Flexible manufacturing cell (FMC)
Benefits of FMS
- Increased machine utilisation
- Reduced factory floor space requirement
- Ability to produce in small batch size (as small as one)
- Reduced inventory
- Shorter manufacturing lead times with quick 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 skilled work force (extensive training requirement)
What are the points on the New Manufacturing Enterprise Wheel ?
Customer
People, Teamwork, Organisation
Shared Knowledge and Systems
Key Processes
Resources and Responsibilities
Manufacturing Infrastructure
Five Principles of Lean thinking?
Value, Value Stream, Flow, Pull, Perfection
What is the definition of Lean
The identification and elimination of waste
What is the definition of waste?
Any part of the process that adds no value
Whats the use of Value Stream Mapping(VSM)?
Follow a product’s production path from beginning to end, and draw a visual representation of every process in the material and information flow
What are some of the advantages of VSM?
- Helps to visualise flow
- Allows to see and identify the sources of waste easier
- Shows the links of information and material flow
- Provides a common language for talking about manufacturing processes
- Allows to describe in detail how the plant should operate in order to create flow
- Forms the basis of an implementation plan (blueprint for lean implementation)
What are the 7s wastes?
- Overproduction
- Transport
- Inventory
- Excess Motion
- Waiting
- Over processing
- Defects
What is Takt Time?
Synchronises pace of production to match pace of sales
What is the difference between batch flow and continuous flow?
Batch: This involves the processing of bulk material in batches through each step of the desired process.
Continuous flow: This processing involves moving one work unit at a time between each step of the process with no breaks in time, sequence, substance or extent.
What is a bottleneck ?
Bottleneck in a supply chain means the process that requires the longest time in operations of the supply chain for certain demand.
Standardised Work Combination Table
Visual representation of the combination of manual work time, walk time and machine processing time for each operator in a production sequence
What are the benefits of having a standardised work combination table?
- Shows the interaction between operator and machines in a process
- Displays more detail and is more precise than the operator balance chart
- Easy to see where work can be redistributed amongst the operators
