What it shows
Prevention activities (records) per month as shares of 100%: planned prevention against prevention set off by a failure, with prevention sets that have no sub-bucket as Uncategorized.
Why it matters in manufacturing
A rise in reactive prevention shows that failures are driving the prevention work instead of a plan.
How to read it
Look for the dark band to stay wide. Hover a month for the shares and counts. A large Uncategorized band means the split is incomplete: give those sets a sub-bucket in master data.
What good looks like
The planned band stays wide and steady, and the reactive band stays thin outside the months after a large failure.