Ability to save a baseline of a strategy roadmap to see history of changes

What is the challenge?

I need to be able to see the history of changes to the dates of initiatives on a roadmap by saving a baseline at a point in time and then tracking the changes to those dates.

What is the impact?

I'm unable to see how often an initiatives' timeline changes or how far off we were in our planning.

Describe your idea

Provide a function whereby I can save a baseline of the strategy roadmap. Then use that date to see a history of changes since then. Allow me to re-save the baseline to start the "starting point" over again.