Use the
Value Stream Map Comparison
form to compare the value stream of the current state to the future state.
Because you can use a value stream map to focus on cycle times and to identify
waste, it is a key tool in all lean projects.
The
Value Stream Map Comparison
answers the following questions.
What is the total value added
for the current state?
What is the total value added
for the future state?
What steps in the process add
value and what steps do not add value?
Were steps that did not add
value in the current state eliminated or modified in the future state?
How-to
Choose all steps from the process maps or equivalent portions of the two
processes. Otherwise, the comparison will be biased by the use of incomplete
and potentially unbalanced data.
You must have a value stream
map with lean data (VA and NVA) for each step in the current state.
You must have a second value
stream map with lean data (VA and NVA) for each step in the future state.
In the
Current State Map
table, choose the current state map, then choose the shape data to add. In most
cases, all shapes contribute to the total percentages of value added and
non-value added.
In the
Future State Map
table, choose the future state map, then choose the shape data to add. In most
cases, all shapes contribute to the total percentages of value added and
non-value added.