Makes comparisons of the value stream between the current state and the future state. Because the value stream map can be used to focus on cycle times and waste identification, it is a key tool in all Lean projects.
|When to Use||Purpose|
|End of project||Document the effects of changes to the process on the percentage value-add and percentage non-value-add.|
No data requirements exist because you only use this tool to display data collected elsewhere.
You should select all steps from the value stream maps or equivalent portions of the two processes. Otherwise, the comparison will be biased by the use of incomplete and potentially unbalanced data.