Lecture 5

Question 1

What is value stream mapping?

Answer 1

• data rich, collected by a team
• visual representation of process regarding material and information flow
• helps you see the flow of material and information as a product or service moves through the value stream

Question 2

Definition of a value stream map

Answer 2

A value stream map is all the actions that are required to take a product or service, from order to delivery. It is a graphical representation of the entire value strwam which includes material information and product flow

Question 3

The benefits of the value stream map (7)

Answer 3

• graphically represents the total value stream
• provides shared understanding in a common language
• highlight waste
• visualize flow and connection of Lean techniques
• identifies process bottlenecks
• improve the bigger picture, rather than individual processes
• forms the basis for continuous improvement

Question 4

Levels of a value stream

Answer 4

• process
• single plant
• multiple plants
• across companies

Question 5

Principles for creating a VSM (value stream map)

Answer 5

the diagram needs to be one sheet of paper, use the standard symbols for the diagram. Use the standard symbols for the diagram, capture all the data yourself. Walk, understand & validate the process, involve people

Question 6

What is value stream mapping?

Answer 6

Once the product family is selected. The mapping process starts with the current state flow with value add and non-value add activities

Question 7

Value stream mapping in 5 steps

Answer 7

1. determine product family to set the scope
2. draw the process flow map
3. add the material and information flow
4. add data in the data collection boxes
5. add process time and lead time data

Question 8

Processing time

Answer 8

process in steps of each step added

Question 9

machine cycle time

Answer 9

all value adds

Question 10

inventory time

Answer 10

inventory (parts)/ output per day

Question 11

process lead time (PLT)

Answer 11

processing time + inventory time

Question 12

Process cycle efficiency (PCE) %

Answer 12

value add time/ process lead time (PLT) (x 100)

Question 13

The value stream map includes:

Answer 13

• information flow
• material flow
• time line

Question 14

Information flow

Answer 14

customer orders fed into the production control

Question 15

Material flow

Answer 15

Shows movement of materials from upstream to downstream

Question 16

Little’s law

Answer 16

work in progress/ exitrate per time unit