文档介绍：Value Stream
Mapping
Value Steam Mapping
The Value Stream - a definition
“All of the steps required to bring a product or
service from raw state through to the customer”
Total Value Stream
Supplier Process Process Process Customer
C B A
Internal Plant
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Value Steam Mapping
What is Value Stream Mapping?
Value Stream Mapping is a powerful technique that allows
us to create a “BIG PICTURE” visual representation of:
– All the steps in the process, working back from
customer demand to raw material
– The flow of both material and information and the
effect they have on each other
– The distinction between value-added and non-value-
added activity (WASTE)
– The effect all of the above have on meeting the
customer’s requirements
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Value Steam Mapping
The 8 Wastes
Scrap/Rework
Over-production Inventory Motion
Under-utilized People
Processing Transportation Waiting
(manpower, material, machine)
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Value Steam Mapping
#1 Scrap/Rework
Definition:
– Any product that does not
meet specifications and
therefore either needs to be
reworked or scrapped
Goal:
– 100% First Time Through
Quality
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Value Steam Mapping
#2 Over-production (Under)
Definition:
– Producing more than is
necessary, often causing
WIP (Work In Process);
working on parts ahead of
schedule while delinquent
parts wait
Goal:
– Produce to Target Cycle
Time then eventually
produce all operations to
Takt Time in the Future
State
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Value Steam Mapping
# 3 Inventory
Definition: material or parts that are stored for future use or
shipment
Before After
If you had only 30 seconds to find the unit…
...which storage system would you choose?
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Value Steam Mapping
#4 Motion
Definition:
– Excessive motion beyond what is needed to get the job done
Goal: Same as Definition
???
sitting searching turning walking
around
climbing choosing bending lying down
over
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Value Steam Mappi