Computer Integrated Manufacturing(CIM)

Question 1

What are the objectives of CIM??

Answer 1

• Simplify
• Automate
• Integrate

Question 2

Whats the concept of CIM

Answer 2

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

Question 3

What are some of the functions of CIM(Enterprise software)?

Answer 3

• 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

Question 4

What does CAD offer in terms of CIM?

Answer 4

Supports the design engineering function by effective use of a computer to create, modify, analyse and document.

Question 5

What does CAM offer in terms of CIM?

Answer 5

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

Question 6

What are some of the subsystems which need to be integrated as a whole?

Answer 6

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

Question 7

Why are subsystems designed, developed and implemented?

Answer 7

They are designed, developed and implemented implemented so that the output of one subsystem serves as input of another subsystem.

Question 8

What are the 2 functions subsystems are usually divided into ?

Answer 8

• 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

Question 9

What is a Flexible Manufacturing System ?

Answer 9

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

Question 10

Types of CIM?

Answer 10

• Single machine manufacturing cell

- Flexible manufacturing cell (FMC)

Question 11

Benefits of FMS

Answer 11

• 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

Question 12

Issues with FMS?

Answer 12

• 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)

Question 13

What are the points on the New Manufacturing Enterprise Wheel ?

Answer 13

Customer

People, Teamwork, Organisation

Shared Knowledge and Systems

Key Processes

Resources and Responsibilities

Manufacturing Infrastructure

Question 14

Five Principles of Lean thinking?

Answer 14

Value, Value Stream, Flow, Pull, Perfection

Question 15

What is the definition of Lean

Answer 15

The identification and elimination of waste

Question 16

What is the definition of waste?

Answer 16

Any part of the process that adds no value

Question 17

Whats the use of Value Stream Mapping(VSM)?

Answer 17

Follow a product’s production path from beginning to end, and draw a visual representation of every process in the material and information flow

Question 18

What are some of the advantages of VSM?

Answer 18

• 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)

Question 19

What are the 7s wastes?

Answer 19

• Overproduction
• Transport
• Inventory
• Excess Motion
• Waiting
• Over processing
• Defects

Question 20

What is Takt Time?

Answer 20

Synchronises pace of production to match pace of sales

Question 21

What is the difference between batch flow and continuous flow?

Answer 21

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.

Question 22

What is a bottleneck ?

Answer 22

Bottleneck in a supply chain means the process that requires the longest time in operations of the supply chain for certain demand.

Question 23

Standardised Work Combination Table

Answer 23

Visual representation of the combination of manual work time, walk time and machine processing time for each operator in a production sequence

Question 24

What are the benefits of having a standardised work combination table?

Answer 24

• 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