Value Stream Map Comparison

Summary

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.

Answers the questions:
  • What is the total value-add for the current state?
  • What is the total value-add for the future state?
  • What steps in the process add value and what steps do not add value?
  • Were non-value-add steps in the current state eliminated or modified in the future state?
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.

Data

No data requirements exist because you only use this tool to display data collected elsewhere.

How-To

  1. You must have a value stream map with Lean data (CT, VA CT, NVA CT) filled out for each step in the current state.
  2. You must have a second value stream map with Lean data (CT, VA CT, NVA CT) filled out for each step in the future state.
  3. In the Current State Map table, select the current state map, and then select the shape data to add. In most cases, you should select all shapes because they all contribute to the total percentages of value-add and non-value-add.
  4. In the Future State Map table, select the future state map, and then select the shape data to add. In most cases, you should select all shapes because they all contribute to the total percentages of value-add and non-value-add.

Guidelines

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.

By using this site you agree to the use of cookies for analytics and personalized content.  Read our policy